{ "id": "insurance_market_withdrawal", "version": "1.0", "status": "active", "scenario_type": "Institutional Finance", "name": "Insurance Market Withdrawal Scenario", "subtitle": "Which assets become economically nonviable first as insurers exit wildfire, flood, and hurricane markets?", "region_id": "us", "tags": [ "insurance", "climate-risk", "physical-risk", "financial-stress", "managed-retreat", "fiscal", "mortgage", "mandate" ], "description": "Private insurance markets are withdrawing from the highest climate-risk US geographies faster than any climate policy has anticipated. State Farm and Allstate have stopped writing new homeowners policies in California. Farmers Insurance exited Florida entirely. Reinsurers (Munich Re, Swiss Re) are raising catastrophe loss assumptions by 5\u20137% annually. In 18 US states, residential insurance premiums have risen 40\u201390% since 2020 \u2014 in some Florida coastal ZIP codes, to $30,000\u2013$80,000/year on median-value homes. When insurance is unavailable or unaffordable, mortgages become unavailable (lenders require insurance). When mortgages are unavailable, property values collapse. When property values collapse, municipal tax bases erode. When tax bases erode, governments cannot fund the adaptation infrastructure (seawalls, storm sewers, grid hardening) that would make properties insurable again. This feedback loop \u2014 insurance withdrawal \u2192 mortgage unavailability \u2192 property value collapse \u2192 tax base erosion \u2192 adaptation funding failure \u2192 deeper insurance withdrawal \u2014 is not modelled in standard climate economic frameworks. This scenario maps the cascade across the three highest-risk US geographies (Florida coastal, California wildland-urban interface, Gulf Coast) and produces uninsurable ZIP code timelines, tax base erosion forecasts, municipal bond stress indicators, and migration pressure estimates that are directly actionable for insurers, municipalities, mortgage lenders, and state governments.", "baseline": { "year": 2026, "total_us_homeowners_insured_bn": 1.1, "voluntary_market_policies_at_risk_m": 4.8, "state_insurer_of_last_resort_policies_m": 2.1, "florida_citizens_policies_m": 1.3, "california_fair_plan_policies_thousands": 380, "reinsurance_cat_loss_assumption_increase_pct_annual": 6.2, "us_avg_homeowners_premium_increase_2020_2026_pct": 58, "florida_coastal_premium_median_usd": 11400, "california_wui_premium_median_usd": 8900, "gulf_coast_wind_premium_median_usd": 7200, "uninsured_coastal_properties_est_bn": 1.7, "mortgage_lender_insurance_requirement": "mandatory", "notes": "State Farm California exit (March 2023): 72,000 policies. Allstate California exit (2022): 36,000 policies. Farmers Florida exit (2023): 100,000 policies. Florida Citizens (state insurer of last resort) now holds 1.3M policies \u2014 more than any private insurer in the state, a sign of complete voluntary market failure. FAIR Plan policies in California up 49% since 2020. Reinsurance assumptions: Munich Re 2025 annual report documents 6.2% annual increase in modelled catastrophe loss \u2014 compounding over 10 years = 83% higher assumed losses." }, "target": { "reduction_pct": 35, "deadline_year": 2035, "horizon_years": 9, "required_reduction_mt_co2": 0.0, "ceiling_mt_co2_by_2035": 0.0, "reliability_target": "Voluntary private insurance market maintains coverage for \u226585% of at-risk residential properties in the three high-risk regions without state insurer of last resort exceeding $400B in total exposure", "penalty": { "description": "State insurer of last resort (Citizens FL, FAIR Plan CA, Louisiana Citizens) becomes the dominant market player \u2014 effectively socializing climate risk through assessments on all policyholders in the state. Above $400B state insurer exposure, state governments face sovereign credit rating downgrades. FHFA could require mandatory flood/fire insurance disclosure for all GSE-backed mortgages \u2014 triggering rapid value repricing of 2.4M homes currently in high-risk zones without adequate coverage.", "mechanism": "FHFA climate risk disclosure rules; state insurer solvency triggers; GSE mortgage eligibility criteria" }, "notes": "This is not an emissions scenario \u2014 it is an institutional finance and managed retreat scenario. The 'mandate' is the financial system's implicit requirement that insurable value exists as a precondition for credit availability. When insurance fails, credit fails, and property markets become cash-only transactions dominated by distressed buyers. The scenario models where and when that transition occurs." }, "structural_constraints": { "florida_coastal_properties_at_risk_m": 1.8, "california_wui_properties_at_risk_m": 2.1, "gulf_coast_properties_at_risk_m": 0.9, "total_at_risk_residential_value_tn": 3.4, "total_at_risk_value_arithmetic_note": "AUDIT FLAG (HIGH): risk_geographies sum = $693B (FL) + $1,722B (CA) + $218B (Gulf) = $2.633T. The $3.4T figure in structural_constraints likely includes commercial real estate, second homes, and undercounted inland WUI properties not captured in the three primary risk geography counts. Source for the $0.77T gap should be declared. Until resolved, use $2.6T as the documented floor and $3.4T as the upper-bound estimate including modeled-but-not-enumerated categories.", "gsm_backed_mortgage_share_at_risk_pct": 62, "municipal_bond_property_tax_dependency_pct": 71, "annual_cat_losses_2021_2025_avg_usd_b": 112, "annual_cat_losses_2026_2030_projected_usd_b": 168, "insurer_roe_threshold_pct": 10, "florida_current_insurer_roe_pct": -3.2, "florida_insurers_insolvent_since_2020": 12, "permitting": { "managed_retreat_authority": "Voluntary in all 50 states; no federal mandatory retreat authority exists", "buyout_timeline_yr": 4, "notes": "FEMA Hazard Mitigation Grant Program (HMGP) buyouts: 4-year average from disaster declaration to property purchase. 50-year history: only 45,000 buyouts total nationally \u2014 vs 1.8M Florida coastal properties at high risk. Scale mismatch of 40:1." } }, "fleet_evolution": { "not_applicable": true, "reason": "Institutional Finance scenario \u2014 insurance market withdrawal from coastal risk; power generation fleet evolution not applicable." }, "risk_geographies": [ { "name": "Florida Atlantic + Gulf Coastal Zone", "zip_codes_at_risk": 312, "properties_at_risk": 1800000, "median_home_value_usd": 385000, "total_at_risk_value_usd_b": 693.0, "current_voluntary_insurance_coverage_pct": 58, "citizens_coverage_pct": 31, "uninsured_pct": 11, "annual_premium_median_usd": 11400, "premium_as_pct_home_value": 2.96, "uninsurable_threshold_premium_pct": 4.5, "year_uninsurable_threshold_reached": 2029, "uninsurable_threshold_epistemic_label": "ASSUMED \u2014 the 4.5% premium-to-value threshold for 'uninsurability' is a First Street Foundation modeling convention, not a regulatory rule or uniform lender standard. Some lenders will accept higher premiums for equity-rich properties; some homeowners will self-insure (accept no coverage). The threshold date should be treated as an indicator of market stress onset, not a binary cliff.", "municipal_bonds_outstanding_usd_b": 84.0, "property_tax_revenue_at_risk_usd_b_annual": 12.4, "notes": "Miami-Dade, Broward, Palm Beach, Monroe (Keys), Lee, Collier: all reach 4.5% premium-to-value threshold (unaffordable by standard mortgage affordability metrics) by 2029 under current reinsurance trend. Monroe County (Florida Keys) already effectively uninsurable voluntarily \u2014 89% on Citizens." }, { "name": "California Wildland-Urban Interface", "zip_codes_at_risk": 418, "properties_at_risk": 2100000, "median_home_value_usd": 820000, "total_at_risk_value_usd_b": 1722.0, "current_voluntary_insurance_coverage_pct": 44, "fair_plan_coverage_pct": 18, "uninsured_pct": 38, "annual_premium_median_usd": 8900, "premium_as_pct_home_value": 1.09, "uninsurable_threshold_premium_pct": 3.0, "year_uninsurable_threshold_reached": 2031, "municipal_bonds_outstanding_usd_b": 127.0, "property_tax_revenue_at_risk_usd_b_annual": 31.2, "notes": "LA, Ventura, San Diego, Sacramento, Butte counties: 38% currently uninsured (no voluntary market, FAIR Plan capacity exhausted). 2025 LA wildfires ($25B insured loss) accelerated FAIR Plan exposure to $460B \u2014 3\u00d7 its claims-paying capacity. FAIR Plan insolvency would trigger statewide assessment on all CA policyholders." }, { "name": "Gulf Coast / Louisiana + Texas Coast", "zip_codes_at_risk": 186, "properties_at_risk": 890000, "median_home_value_usd": 245000, "total_at_risk_value_usd_b": 218.0, "current_voluntary_insurance_coverage_pct": 51, "louisiana_citizens_coverage_pct": 28, "uninsured_pct": 21, "annual_premium_median_usd": 7200, "premium_as_pct_home_value": 2.94, "uninsurable_threshold_premium_pct": 4.5, "year_uninsurable_threshold_reached": 2030, "municipal_bonds_outstanding_usd_b": 31.0, "property_tax_revenue_at_risk_usd_b_annual": 4.8, "notes": "New Orleans metro, Galveston Bay, Lake Charles: repeated major hurricane strikes (Ida 2021, Zeta 2020) have driven 12 private insurer insolvencies in Louisiana since 2021. Louisiana Citizens now dominates with 28% market share \u2014 up from 4% in 2019." } ], "tech_vectors": [ { "id": "parametric_insurance_scaling", "name": "Parametric + Public-Private Insurance Backstop", "description": "Federal parametric insurance backstop analogous to the National Flood Insurance Program (NFIP) but for wildfire and wind, using satellite-verified physical triggers (wind speed, fire perimeter, storm surge) rather than individual loss adjustment. Eliminates moral hazard and adverse selection that drive voluntary insurer exit. Reduces loss adjustment cost from 18% to 3% of premium. Treasury backstop guarantees up to $200B/yr in catastrophe losses. Funded by risk-based premiums (no cross-subsidy). Stabilizes private insurer participation by reducing tail-risk exposure.", "federal_backstop_capacity_usd_b": 200, "loss_adjustment_reduction_pct": 15, "voluntary_market_stabilization_pct": 22, "ce_model_mapping": "financial_stress fiscal", "estimated_mt_co2": 0.0, "constraints": { "total_lead_time_yr": 2.0, "critical_path": "Congressional authorization; FEMA actuarial capacity for parametric model; Treasury reinsurance treaty with Munich Re / Swiss Re", "cost_usd_b_annual_federal": 4.2, "note": "Annual federal cost = expected loss payout above private market attachment minus risk-based premium revenue. Net cost estimated $4.2B/yr." } }, { "id": "managed_retreat_acceleration", "name": "Managed Retreat Buyout Program (HMGP 10\u00d7)", "description": "Scale FEMA HMGP buyouts from 9,000/yr to 90,000/yr through pre-authorized community-level buyout zones, streamlined NEPA categorical exclusions, and direct federal-to-homeowner purchase authority. Target 450,000 highest-risk properties (below 5ft BFE, repeat flood loss, WUI extreme fire hazard) over 5 years. Converts uninsurable liabilities into municipal green space or wetland restoration. Reduces total at-risk exposure by 25% and reverses tax base erosion in 68 identified high-risk municipalities.", "annual_buyouts_target": 90000, "five_year_buyout_total": 450000, "average_buyout_price_usd": 285000, "total_program_cost_usd_b": 128.0, "tax_base_erosion_prevented_usd_b": 19.0, "ce_model_mapping": "fiscal land_valuation adaptation", "estimated_mt_co2": 0.0, "constraints": { "total_lead_time_yr": 1.5, "critical_path": "Voluntary participation rate (historical HMGP: 60\u201375% acceptance); just transition \u2014 68% of highest-risk properties are low-to-moderate income; relocation housing availability in destination cities", "cost_usd_b": 128.0 } }, { "id": "climate_disclosure_mortgage", "name": "FHFA Climate Risk Disclosure + Mortgage Repricing", "description": "FHFA requires Fannie Mae and Freddie Mac to incorporate forward-looking physical climate risk scores into GSE mortgage underwriting criteria. Properties in FEMA-designated high-risk zones with voluntary insurance gap are flagged for mandatory coverage or risk-adjusted pricing. Triggers $2\u20134T in gradual property value repricing over 10 years \u2014 painful but orderly vs a sudden uninsurability cliff. Creates investment signals for adaptation infrastructure (seawalls, firebreaks, storm sewer upgrades) that restore insurability.", "gse_mortgages_affected_m": 2.4, "repricing_timeline_yr": 10, "property_value_adjustment_pct": -18, "adaptation_investment_unlocked_usd_b": 48.0, "ce_model_mapping": "financial_stress fiscal land_valuation", "estimated_mt_co2": 0.0, "constraints": { "total_lead_time_yr": 1.0, "critical_path": "FHFA rulemaking (18 months); Fannie/Freddie systems integration; political opposition from high-risk state Congressional delegations", "cost_usd_b": 0.3, "note": "Low direct cost \u2014 triggers market-driven repricing rather than direct government expenditure" } } ], "cascade_model": { "step_1": { "name": "Insurer Exit / Premium Spike", "trigger": "Cat loss ratio above 1.0 for 3 consecutive years", "timeline_years_from_trigger": 0, "affected_properties_m": 4.8, "premium_increase_pct": 85 }, "step_2": { "name": "Mortgage Unavailability", "trigger": "Insurance premium > 4.5% of home value (standard mortgage affordability threshold)", "timeline_years_from_trigger": 1, "affected_mortgages_m": 1.6, "market_becomes_cash_only": true }, "step_3": { "name": "Property Value Collapse", "trigger": "Cash-only market; buyer pool shrinks to distressed buyers and institutional investors", "timeline_years_from_trigger": 2, "value_decline_pct": 35, "value_decline_epistemic_label": "ESTIMATED \u2014 based on Monroe County FL 2020-2025 observed declines and modeled extrapolation. Wide empirical range: observed cash-only market transitions range 15-55% decline depending on buyer pool depth, distance from metro markets, and availability of institutional buyers. A 35% uniform assumption likely understates decline in thin rural markets (50%+) and overstates it in cash-rich metro-adjacent coastal markets (15-20%).", "total_value_loss_usd_b": 420.0 }, "step_4": { "name": "Municipal Tax Base Erosion", "trigger": "Property value reassessment; tax revenue falls below debt service coverage", "timeline_years_from_trigger": 3, "annual_revenue_loss_usd_b": 18.2, "bonds_at_risk_usd_b": 242.0, "credit_rating_downgrades": 47 }, "step_5": { "name": "Adaptation Funding Failure", "trigger": "Municipal bond market access restricted; can't finance seawall/stormwater/grid hardening", "timeline_years_from_trigger": 4, "adaptation_investment_gap_usd_b_annual": 14.6 }, "step_6": { "name": "Accelerated Physical Damage \u2192 Deeper Insurance Withdrawal", "trigger": "Underinvested infrastructure increases loss frequency; remaining insurers exit", "timeline_years_from_trigger": 5, "notes": "The loop closes: step 6 feeds back into step 1 at higher severity. Each cycle covers a larger geographic area." } }, "model_gaps": [ { "gap": "Property value-insurance feedback loop", "impact": "HIGH \u2014 CE damage models are one-directional (climate \u2192 asset damage). The insurance \u2192 mortgage \u2192 property value \u2192 tax base \u2192 adaptation funding loop is not modelled.", "mitigation": "FinancialStressService insurance_withdrawal_multiplier; FiscalService tax_base_erosion_pct applied iteratively over scenario timeline" }, { "gap": "State insurer of last resort solvency", "impact": "HIGH \u2014 CE has no model for state-level insurer balance sheets (Citizens FL, FAIR Plan CA). Solvency breach and statewide assessment cascade are not captured.", "mitigation": "FiscalService state_contingent_liability parameter; manual assessment burden calculation" }, { "gap": "Managed retreat behavioral economics", "impact": "MEDIUM \u2014 Homeowner acceptance rates for voluntary buyouts vary 40\u201385% by community type, race, income, and prior disaster exposure. CE cannot model individual-level acceptance.", "mitigation": "60% acceptance rate assumption based on HMGP historical data; sensitivity analysis at 40% and 80%" } ], "analysis": { "critical_path": "managed_retreat_acceleration", "abatement_needed_mt_co2": 0.0, "confidence": "high", "confidence_rationale": "Insurance market data (AM Best, NAIC, state DOI filings) is real-time and well-documented. Property value responses to insurance unavailability observed directly in Monroe County FL (2020\u20132025). Municipal bond stress from tax base erosion documented in Louisiana parishes post-Ida. High confidence in cascade mechanism; moderate confidence in 5-year timing.", "key_outputs": { "uninsurable_zip_codes_by_2030": 198, "uninsurable_zip_codes_by_2035": 487, "properties_cash_only_by_2030_m": 1.6, "tax_base_erosion_5yr_usd_b": 91.0, "tax_base_erosion_arithmetic_note": "AUDIT FLAG (HIGH): projections.annual_property_tax_revenue_at_risk_usd_b for 2026-2030 sums to $75.0B ($8.4+$11.2+$14.8+$18.2+$22.4). The $91B figure appears to include a compounding tax base loss from prior-year value declines accumulating in the assessment base. The basis for the $91B vs $75B difference should be disclosed. Use $75B as the documented floor from the projections table.", "municipal_bonds_at_risk_usd_b": 242.0, "migration_pressure_households_by_2035_thousands": 890 }, "notes": "This is the scenario where climate economics becomes directly visible to every homeowner, lender, and local government official in high-risk zones. The institutional decision calculus shifts from 'how do we reduce emissions' to 'how do we manage an orderly retreat from uninsurable assets before the disorderly version happens.' CE's value here is producing the uninsurability timeline before it becomes a crisis \u2014 which is what institutional planning requires.", "estimated_total_mt_co2": 0.0 }, "projections": { "years": [ 2026, 2027, 2028, 2029, 2030, 2031, 2032, 2033, 2034, 2035 ], "voluntary_market_coverage_pct": [ 58.0, 54.0, 49.0, 43.0, 37.0, 32.0, 28.0, 25.0, 23.0, 21.0 ], "uninsurable_zip_codes": [ 84, 112, 141, 168, 198, 241, 298, 352, 418, 487 ], "annual_property_tax_revenue_at_risk_usd_b": [ 8.4, 11.2, 14.8, 18.2, 22.4, 27.1, 31.8, 36.2, 40.1, 48.4 ], "cumulative_property_value_loss_usd_b": [ 45, 98, 162, 241, 335, 420, 512, 598, 674, 740 ], "migration_pressure_households_thousands": [ 85, 145, 220, 320, 440, 560, 660, 750, 820, 890 ], "ceiling_mt_co2": 0.0 }, "non_compliance": { "trigger_year": 2029, "mandate_cost_label": "~$132.5B", "mandate_cost_description": "Federal parametric backstop setup ($4.2B/yr ongoing) + managed retreat buyouts ($128B over 5 years) + FHFA repricing system ($0.3B)", "mechanism": "Without federal backstop: state insurer of last resort solvency breach triggers statewide assessment cascade (all policyholders pay); municipal bond defaults in 47 high-risk municipalities; FHFA forced to suspend GSE activity in highest-risk ZIP codes \u2014 triggering sudden disorderly property repricing.", "affected_exports_usd_b": 1542.0, "embedded_emissions_mt_co2": 0, "max_annual_cost_usd_b": 48.4, "five_year_cumulative_usd_b": 335.0, "affected_sectors": [ { "name": "Insurance / Reinsurance", "icon": "fa-shield-halved", "export_value_usd_b": 380.0, "jobs": 640000, "notes": "Voluntary insurer exit from three regions. State insurer of last resort (Citizens FL, FAIR Plan CA, Louisiana Citizens) absorbs market \u2014 but without capital reserves of private market. CA FAIR Plan: $460B exposure vs $200M claims-paying capacity." }, { "name": "Mortgage Lending / GSEs", "icon": "fa-house", "export_value_usd_b": 180.0, "jobs": 280000, "notes": "Fannie Mae and Freddie Mac: 2.4M mortgages in high-risk zones. Insurance requirement cannot be met \u2192 GSE eligibility suspended \u2192 market becomes cash-only \u2192 property values fall \u2192 mortgage book impairment." }, { "name": "Municipal Finance", "icon": "fa-building-columns", "export_value_usd_b": 242.0, "jobs": 95000, "notes": "$242B in municipal bonds across 3 regions dependent on property tax revenue. 47 municipalities face debt service coverage ratio below 1.0 by 2031. Credit rating downgrades cascade to higher borrowing costs \u2014 compressing adaptation budgets further." }, { "name": "Coastal Real Estate", "icon": "fa-water", "export_value_usd_b": 740.0, "jobs": 420000, "notes": "$3.4T in total at-risk residential value; $740B in cumulative value loss by 2035 under no-intervention scenario. Largest single wealth transfer in US history outside the 2008 financial crisis \u2014 but distributed across millions of individual homeowners." } ] }, "action_items": [ { "id": "ai_01", "audience": "sovereign_policymaker", "action": "California, Florida, and Louisiana insurance commissioners: convene actuarially sound FAIR plan recapitalisation reviews NOW \u2014 before the 2026 hurricane season begins \u2014 and establish minimum reserve requirements sufficient to cover a 1-in-25-year loss event.", "rationale": "FAIR plans in California and Florida are technically insolvent relative to the tail risk they now carry. A major hurricane landfall in 2026 would trigger assessments on solvent insurers that could themselves cause solvency stress. Recapitalisation review costs nothing; inadequate reserves cost billions.", "defensible_basis": "Florida Citizens Property Insurance actuarial solvency report (2025); California FAIR Plan exposure report (2025); NAIC model solvency regulation. Insurance commissioner authority to require reserve adequacy assessments is existing regulatory power.", "urgency": "immediate", "no_regret": true }, { "id": "ai_02", "audience": "institutional_investor", "action": "Mortgage lenders with portfolios in the 198 at-risk ZIP codes: require proof of valid property insurance at each annual renewal \u2014 not just at origination \u2014 and model FAIR plan premium escalation (+40\u201360%) as a mandatory stress scenario in mortgage affordability models.", "rationale": "Properties in markets where private insurance has withdrawn face FAIR plan premiums 3\u20135x standard market rates. A borrower who was solvent at origination may become payment-delinquent when private insurance exits. Standard mortgage servicing rules require annual insurance verification \u2014 this is already legally required.", "defensible_basis": "Fannie Mae/Freddie Mac Seller-Servicer Guide (annual insurance verification requirement); CFPB mortgage servicing rules; NAIC climate risk in insurance report (2024). Existing regulatory obligation \u2014 requires active enforcement, not new rules.", "urgency": "immediate", "no_regret": true }, { "id": "ai_03", "audience": "sovereign_policymaker", "action": "FEMA: expand the National Flood Insurance Program's Community Rating System (CRS) incentives for managed retreat in coastal communities \u2014 specifically, allow CRS credits for voluntary property buyout programmes that reduce insured exposure in the highest-risk zones.", "rationale": "Managed retreat is economically superior to repeat insurance payouts in the highest-risk zones, but current NFIP incentive structures do not reward communities for reducing exposure through buyouts. Adding CRS credits for buyouts aligns incentive structures with long-run actuarial solvency.", "defensible_basis": "FEMA CRS Coordinator's Manual (2017 edition, pending 2026 update); NFIP actuarial reform requirements under Biggert-Waters Act; GAO NFIP solvency report (2025). CRS incentive modification is within FEMA administrative authority.", "urgency": "near_term", "no_regret": true }, { "id": "ai_04", "audience": "corporate_industrial_buyer", "action": "Homeowners and businesses in the 198 at-risk ZIP codes: conduct a professional building resilience audit and document all upgrades (roof strapping, impact windows, elevated mechanical systems) in a physical resilience dossier \u2014 this is now the primary mechanism to access FAIR plan coverage or private market re-entry.", "rationale": "Insurers re-entering or remaining in high-risk markets are increasingly condition-based \u2014 willing to insure resilient structures at standard rates but not unimproved stock. A documented resilience audit is the most defensible action a property owner can take to maintain insurability regardless of market conditions.", "defensible_basis": "IBHS Fortified Home programme standards; Florida Building Code hurricane hardening requirements; state-level insurance hardening credits (Florida My Safe Florida Home programme). Building code compliance and resilience certification are within property owner control.", "urgency": "near_term", "no_regret": true } ], "sources": [ "AM Best Insurance Market Report \u2014 P&C Catastrophe Losses 2025", "NAIC State of the Property Insurance Market 2025", "Florida Office of Insurance Regulation \u2014 Citizens Property Insurance Corporation Annual Report 2025", "California Department of Insurance \u2014 FAIR Plan Exposure Report Q4 2025", "FEMA Hazard Mitigation Grant Program \u2014 Buyout Program Statistics 2024", "First Street Foundation \u2014 Property Risk Scoring National Model 2025", "Freddie Mac Economic Housing Research \u2014 Climate Risk and Mortgage Markets 2024", "Louisiana Department of Insurance \u2014 Market Withdrawal and Insolvency Report 2025", "Princeton University Parametric Insurance Research 2024", "Urban Institute \u2014 Community Development Climate Resilience Analysis 2025" ], "failure_conditions": [ "California FAIR Plan insolvency triggered before federal backstop enacted \u2014 statewide policyholder assessment cascade on all CA homeowners, P&C sector credit crisis; FAIR Plan exposure $460B vs $200M claims capacity means any single fire season with losses >$1B/month for 6 months triggers insolvency", "Federal parametric insurance backstop not enacted by 2027 \u2014 voluntary insurer exit continues; state insurers of last resort reach combined $400B+ exposure within 2028-2029; statewide assessment triggers sovereign credit review for Florida and Louisiana", "HMGP buyout authorization not scaled to \u226545,000/yr by 2028 (5\u00d7 current, halfway to 90K target) \u2014 highest-risk properties cycle into uninsured/cash-only market faster than managed retreat removes them; net uninsurable ZIP code count accelerates beyond 198 by 2030", "FHFA declines to implement climate risk disclosure rules before 2028 \u2014 2.4M GSE-backed mortgages in high-risk zones remain mis-priced; disorderly repricing event triggered by external shock (major hurricane, wildfire season) rather than managed regulatory transition", "Voluntary market coverage falls below 30% in any single risk geography before 2028 (currently 44% CA, 58% FL) \u2014 signals accelerating insurer exit beyond baseline trajectory; indicates tipping point into structural market failure rather than managed withdrawal", "47+ municipal bond downgrades cluster in 18-month window \u2014 triggers GSE mortgage eligibility review of entire metropolitan statistical areas, not individual properties; contagion effect spreads beyond modeled ZIP codes" ], "decision_windows": [ { "id": "dw_01", "actor_type": "sovereign_treasury", "region": "US Federal (Treasury/FEMA/FHFA)", "decision": "Introduce federal parametric insurance backstop legislation for wildfire and wind (analogous to NFIP structure) before 2027 Congressional budget cycle \u2014 backstop must be enacted before next major hurricane or wildfire season tests CA FAIR Plan solvency", "time_horizon": "immediate", "deadline": "2027-Q1", "fiscal_instrument": "parametric_insurance", "consequence_if_missed": "Next Category 4+ Gulf/Florida landfall or major CA wildfire season triggers FAIR Plan or Citizens insolvency; statewide assessment on all policyholders; sovereign credit review for FL and LA; disorderly property repricing in 312+ Florida coastal ZIP codes", "no_regret": true }, { "id": "dw_02", "actor_type": "sovereign_treasury", "region": "US Federal (FHFA)", "decision": "Publish FHFA climate risk disclosure rule requiring physical risk scores for GSE-backed mortgages in high-risk zones \u2014 enables orderly repricing over 10 years vs disorderly cliff repricing when insurance unavailability reaches 50%+ of a ZIP code", "time_horizon": "immediate", "deadline": "2027-Q2", "fiscal_instrument": "other", "consequence_if_missed": "2.4M GSE mortgages remain mis-priced; when repricing event occurs (triggered by insurer exit or major storm), it is sudden and disorderly; homeowner wealth loss is 2-3\u00d7 the managed repricing scenario", "no_regret": true }, { "id": "dw_03", "actor_type": "institutional_investor", "region": "Florida, California, Gulf Coast municipal bond markets", "decision": "Reassess $242B in municipal bonds across identified high-risk geographies for property-tax-coverage ratio deterioration; apply First Street Foundation ZIP-code risk scores to debt service coverage analysis; identify the 47 municipalities with <1.0x DSCR by 2031", "time_horizon": "immediate", "deadline": "2026-Q4", "fiscal_instrument": "portfolio_reallocation", "consequence_if_missed": "Municipal bond downgrades cluster in 2028-2030 without prior portfolio adjustment; exposure to distressed muni repricing at below-bid prices in illiquid secondary market", "no_regret": true }, { "id": "dw_04", "actor_type": "project_developer", "region": "Florida, Louisiana, California WUI", "decision": "Launch pre-authorized community buyout zone designations for top-20 highest-risk municipalities; pre-position FEMA HMGP funding commitments so offers can be made within 6 months of next major disaster declaration", "time_horizon": "immediate", "deadline": "2027-Q1", "fiscal_instrument": "other", "consequence_if_missed": "Post-disaster buyout processing continues at 4-year average; properties re-occupied between disaster and buyout completion; repeat flood/fire loss accelerates municipal bond stress in affected areas", "no_regret": true }, { "id": "dw_05", "actor_type": "central_bank", "region": "US (FSOC, OCC, FDIC)", "decision": "Include insurance market withdrawal cascade in next FSOC climate scenario analysis; stress test bank mortgage portfolios for 25-35% property value declines in 198 ZIP codes projected to become effectively uninsurable by 2030", "time_horizon": "medium_term", "deadline": "2027-Q2", "fiscal_instrument": "stress_test", "consequence_if_missed": "Bank capital adequacy frameworks do not model insurance-withdrawal-driven property value decline; NPL surge in coastal mortgage portfolios revealed reactively during stress event", "no_regret": true } ], "created": "2026-05-19", "last_updated": "2026-05-19", "author": "CE Scenario Engine v3.7" }