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FORESTHILL, Calif. — The fast-moving Mosquito Fire in the foothills east of Sacramento doubled in size Friday to at least 46 square miles and threatened 3,600 homes in Placer and El Dorado counties. The fire blanketed parts of Northern California in smoke.

Flames from the wildfire jumped the American River, burning structures in the mountain hamlet of Volcanoville and moving closer to the towns of Foresthill, home to about 1,500 people, and Georgetown, population 3,000. More than 5,700 people in the area have been evacuated, said Placer County Sheriff's Office Lt. Josh Barnhart.

FIRE LATEST: | Mosquito Fire updates, evacuations, fire maps  | Resources

WATCH MORE:  See how pyrocumulus clouds of wildfire smoke create hazards:

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