Extreme heat is the deadliest natural hazard in the United States. 

Between 1992 and 2021, it killed an average of 148 people every year. In the same 30-year period, floods killed about 88 annually while hurricanes killed 45 yearly.

This figure is likely an underestimate, as potential problems have been found with the way deaths due to extreme heat are counted. For instance, National Oceanic and Atmospheric Administration (NOAA) originally counted 200 deaths due to a heat wave that struck the Pacific Northwest in June 2021, but has since amended its description of the event to note the potential for hundreds of excess deaths during the period.

Read more in The Hill.