Firefighting staff are already stretched thin and exhausted from battling the massive blaze, but the heatwave may continue for weeks.
In the far north of the United States, in Alaska, a record-breaking heatwave is worsening wildfires.
Dense smoke has covered large parts of the state.
People in some communities have been moved to safety, while others are being warned to prepare for the worst.
Al Jazeera’s Andy Gallacher reports from Sterling.