The deadly wildfires roaring through Los Angeles County entered a fourth day on Friday. At least 10 people have been killed, about 150,000 are under mandatory evacuation orders and more than 10,000 homes and other structures have been destroyed,

Fierce winds fueled new fires and made it harder to contain the largest blazes, which have destroyed whole neighborhoods and have become some of the most devastating in California’s history.

State prisoners have long been a part of California's firefighting force. Hundreds of them now are deployed in Los Angeles County.