My day of extreme heat in the nation’s capital

As much of the Eastern U.S. experiences potentially record-breaking daytime temperatures, the nights are also staying unusually warm, leaving the human body no time to recover.

A punishing heat wave threatened America's July 4th celebrations, World Cup matches and power grids as near-record temperatures scorched the eastern United States on Friday.

My day of extreme heat in the nation’s capital

A punishing heatwave threatened America's July 4 celebrations, World Cup matches and power grids as near-record temperatures scorched the eastern United States on Friday.

The oppressive heat also altered celebrations in Philadelphia, where temperatures were expected to reach 99 degrees.

In cities across the U.S., parades were canceled and events were delayed because of the heat. Meanwhile, emergency rooms saw a high number of people with heat-related illnesses.