From NPR:

Flooding is by far the most widespread hazard, the report finds.

Of the 3,219 facilities located in harm’s way, more than 2,400 of them are at high risk for flooding, according to flood maps produced by the Federal Emergency Management Agency. And in some places the risk may be even higher than those maps suggest, because FEMA does not take into account long-term sea level rise or other types of climate-driven flooding.