Hurricane Ida in New York Fact Sheet 3: Understanding Stormwater Runoff in Highly Urbanized Areas

The FEMA fact sheet provides an in-depth explanation of stormwater runoff in highly urbanized areas, focusing on the relationship between surface runoff and stormwater drainage systems. It discusses the impacts of intense storms on urban drainage systems and outlines strategies to mitigate urban flooding. Key topics include storm definitions, historical rainfall data for New York City, stormwater drainage systems, combined sewer systems, and regulations on storm drainage performance standards.