The Santa Ana winds are expected to strengthen into Sunday morning with gusts of 30 to 50 mph in coastal areas, and up to 70 mph in the mountains.

"Critical fire-weather conditions will unfortunately ramp up again ... for southern California and last through at least early next week as periodic enhancements of off-shore winds continue," the National Weather Service said. "This may lead to the spread of ongoing fires as well as the development of new ones."

The biggest wildfires ravaging the Los Angeles area have killed at least 11 people and burned more than 10,000 structures. Newsweek's live blog is closed.