Sacramento firefighters kept an overnight vigil on the American River Parkway fire that blanketed parts of Sacramento in smoke and ash Thursday evening.

Firefighters contained the blaze at around 176 acres, but continued to mop up hot spots that smoldered Friday morning.

Under a full moon, embers rained down from trees left smoldering in the blackened area behind Cal Expo.

The cause of the fire is still under investigation, though the origin did appear to be near a homeless camp, according to the fire department’s spokesman.

The evacuation order at Cal Expo was lifted after an estimated 1,000 people were asked to leave the grounds Thursday afternoon.

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