"Scorching Heatwave Sweeps Southwest and Gulf Coast, Breaking Records"

The National Weather Service forecasts record-breaking heat in the Four Corners states, Texas, the Lower Mississippi Valley, and South Florida, with temperatures reaching triple digits and heat index values of 105-115. The Northeast and mid-Atlantic will also experience hot and humid conditions. Tropical Storm Calvin is weakening as it approaches Hawaii, bringing heavy rainfall and flood watches. Parts of the Midwest and Great Lakes will see cooler temperatures. Air quality alerts have been issued for areas affected by smoke from Canadian wildfires.