With temperatures continuing to climb year after year, heat will become one of our primary hazards, perhaps become even more widespread and lethal than flooding. Flooding may only impact smaller geographic areas, while heat emergencies are much broader and can cover entire regions of a continent.
See the study below that looks at the forecast for Europe as it pertains to heat. It is easy to extrapolate facts that apply to us here in the U.S. Like, for instance, the impact of heat on older people and how nations, including ours, have an aging population.
Vulnerability Reduction Needed to Maintain Current Burdens of Heat-Related Mortality in a Changing Climate-Magnitude and Determinants