Record-breaking heatwave grips many US states: ‘Avoid time outside of AC’

Heat warnings or advisories in effect for states on west coast, east coast and south, with more extreme highs forecast

A fierce heatwave that shattered records this weekend will again grip much of the US on Monday, with more than 36 million Americans under excessive heat warnings.

The dangerous temperatures caused the death of a motorcyclist in California’s Death Valley. And they posed challenges for firefighters working in sweltering conditions to battle a series of wildfires across the state.