Firefighters braced late on Tuesday for a resurgence of strong Santa Ana desert winds across Southern California after a day of light breezes helped them gain ground against a blaze displacing thousands of Los Angeles residents near the famed Getty Center museum.

City arson investigators reported earlier on Tuesday that the Getty fire was likely caused by a broken tree branch being blown into power lines during high winds early Monday morning.

Electricity remained cut to roughly half a million homes and businesses in northern and central California on Tuesday as a precaution by the state's largest utility, while firefighting teams and equipment were posted on standby at strategic points throughout the state.