An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
This brochure defines different weather events and conditions that may worsen flooding. Learn which are covered by the NFIP and understand the alerts and advisories for each.
Related Resources
2024 Metropolitan Flooding Social Graphic Philadelphia 3