Thousands of homes are under threat from a raging wildfire that erupted in northern California on Tuesday, as the state simmers in a brutal and potentially historic heatwave.

Roughly 28,000 residents have been forced to evacuate as the Thompson fire quickly swept across more than 3,500 acres (1,416 hectares) near the city of Oroville, about an hour outside Sacramento, California’s capital.

More than 1,400 fire personnel from across the state have deployed to battle the blaze, which was at 0% containment Wednesday afternoon. Eight injuries have been confirmed by officials, at least half of whom were firefighters, as dangerously high temperatures continue to threaten their health and safety.

“The combination of events has presented a huge challenge for firefighters,” he said, urging the public to take extra precautions to limit new fire starts that can quickly spread crews thin, especially as temperatures spike.

“It’s a tough thing to do,” he said. “You are asking people to hike up a mountain when it’s 108F (42.2C) outside.”

Temperatures in the state capital, Sacramento, were forecasted to reach between 105F and 115F (40.5C and 46.1C) – conditions that could last until Sunday.

“This is going to be a severe, prolonged, potentially record-breaking heatwave that may have large impacts for much of California,” said climate scientist Dr Daniel Swain during a broadcast discussion of the heat event on Monday. The long duration will only add to the potential impacts and intensity, especially because little relief can be expected even after the sun sets. “It just isn’t going to cool off – even at night,” Swain said.