Overview

First Street Foundation builds climate-risk models for properties across the United States and provides public and licensed data to help homeowners, insurers, lenders, and governments understand potential hazards. It uses peer‑reviewed methods and climate projections to estimate risks from floods, wildfires, extreme heat, wind, and other perils at the property level, producing scores and maps that explain thirty-year exposure. Its main public product, Risk Factor, gives a 1–10 risk score for individual properties and visualizes area-wide hazards; its data can be accessed for free in summary form and via paid APIs for detailed, property-level data. The foundation differentiates itself by sharing aggregated data publicly (e.g., through AWS Registry of Open Data) while selling detailed data to for-profit clients, aiming to help decision makers in resilience, real estate, insurance, and infrastructure.

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