Over the next three decades, military bases in the contiguous U.S. could, on average, experience an extra month of dangerously hot days, according to a new study.

The hardest hit base will be right here in Arizona.

According to the Pentagon, more than 90% of heat-related illnesses among U.S. service members occur within the U.S.

Barring significant action, that's likely to get worse, says a new analysis by the Union of Concerned Scientists.