SANTA ROSA, California - Wildfires whipped by powerful winds swept through California wine country Monday, killing at least 10 people, destroying 1,500 homes and businesses and sending thousands fleeing as flames raged unchecked through high-end resorts, grocery stores and tree-lined neighborhoods.

As he fled through the ember-strewn streets of his neighborhood in Santa Rosa, Jeff Okrepkie knew it was probably the last time he would see his home of the past five years standing.

His worst fears were confirmed Monday morning, when a friend sent him a photo of what was left: a smoldering heap of burnt metal and debris.

"We live in the valley, where it's concrete and strip malls and hotels and supermarkets," Okrepkie said. "The last thing you think is a forest fire is going to come and wipe us out."

At least 10 people died and two were seriously injured in the blazes that started on Sunday, fire officials said.

The flames were burning "at explosive rates" because of 50 mph winds, said Ken Pimlott, director of the California Department of Forestry and Fire Protection.

Fourteen large fires were burning, spread over a 200-mile region north of San Francisco from Napa in the south to Redding in the north. Governor Jerry Brown declared a state of emergency in Napa, Sonoma and Yuba counties.

It was unusual to have so many fires take off at the same time, fire officials said, though October has generally been the most destructive time of year for California wildfires.

The ferocity of the flames forced authorities to focus primarily on getting people out safely, even if it meant abandoning structures to the fire. The fire area covered more than 100 square miles (160 square kilometers) over eight counties.

Elsewhere in the state, a fire churning through canyons in hilly neighborhoods of Orange County burned multiple homes and forced residents of about 1,000 homes to evacuate.

Some of the largest blazes were in Napa and Sonoma counties, home to dozens of wineries that attract tourists from around the world. They sent smoke as far south as San Francisco, about 60 miles (96 kilometers) away. What caused the blazes was not known.

Fires also burned in Yuba, Butte and Nevada counties - all north of the state capital.

The inferno blackened miles along one of the main gateways into wine country, State Highway 12 into Sonoma County. Wooden fence posts and guard rails burned fiercely. Thick smoke roiled from one winery.

The fires also damaged the Silverado Resort in Napa and a Hilton hotel in Santa Rosa, the largest city in the fire area, with a population of about 175,000.

AP