Precipitation & Flooding
Floods are one of the deadliest of all weather-related hazards in the United States.
We partner with the Climate and Health Program to host data from several sources to track extreme precipitation and flooding in the United States. These data can help communities prepare for and respond to weather-related events.
The Tracking Network provides data about extreme precipitation and the vulnerabilities that increase risk for health effects related to those extreme weather events.
This indicator allows you to look at the number of extreme precipitation days and the monthly estimates of precipitation by county and census tract for every state except Alaska and Hawaii.
Precipitation & Flood Projections
This indicator shows projected precipitation data including number of precipitation days, annual precipitation intensity, and ratio of rain to snow. Data are available at the county level for every state except Alaska and Hawaii.
Precipitation & Flood Vulnerability and Preparedness
This indicator provides county level data on the Federal Emergency Management Agency (FEMA) designated Special Flood Hazard Area including number of square miles within the area, the number of people living in the area, and the number of housing units within the area. These data can be used to estimate the number of people and housing units at risk from flooding.
Tracking precipitation and flooding in a standard way over time can help us
- determine trends over time and place,
- evaluate extreme weather events at the national level, while allowing for comparisons across states,
- better understand the possible health effects and risks to specific groups of people,
- identify conditions that make people vulnerable during extreme weather events, and
- design interventions and communication efforts for at-risk populations.