High temperatures across the Plains, Midwest, mid-Atlantic and Northeast are expected to hit at least 15 degrees above normal ...

Humidity will soon surge to extreme levels across 40 states. Find out where there will be excessive heat and humidity — and how humidity patterns are changing.

While the map shows warmest days of the year on average throughout the United States, this year’s actual conditions may vary widely based on short-term weather and climate patterns. A message from ...