Out of all the dangerous weather events which can claim a life, nothing is more deadly than heat. Globally, extreme heat is the number one weather-related killer, claiming more lives each year than hurricanes, floods, and tornadoes combined. "When you think about us as humans, heat injury sneaks up on us," says New York State Health Commissioner Jim McDonald. "When it's this hot, when you're talking about what we're going through right now, all of us are at risk. Some people are more at risk.