First Street Foundation's 6th National Risk Assessment: Hazardous Heat

ABSTRACT

The First Street Foundation Extreme Heat Model (FSF-EHM) builds upon open datasets from the US Federal Government, augmented with publicly available and third party data sources, and existing research and expertise on heat modeling. The model estimates localized heat risk at a 30-meter resolution across the United States this year and 30 years into the future, creating a high-precision, climate-adjusted heat model that provides insights at a property level. The results indicate that the incidence of extreme heat is growing across the country, both in absolute and relative terms. In order to understand these property level implications, metrics were created which measure temperature thresholds that relate to Health Caution Days, Dangerous Days, Extreme Danger Days, and Local Hot Days.