The National Weather Service called the warm and above-average temperatures coming in behind the system "the first ...

A haunting map from the Cold War era forecasted that vast areas of the U.S. would be covered in radioactive fallout in the ...

Scientists say 4 billion people, about half the world’s population ... hardest hit by additional extreme heat days. Puerto Rico, a territory of the United States, endured 161 days of extreme ...

A major nuclear attack would kill up to 250 million Americans, roughly 75% of the country’s population. While Iran does not ...