Strong Santa Ana winds are fueling multiple wildfires across Southern California, forcing thousands of residents to flee from their homes.

A doorstep video released by The Associated Press and others shows a fire at the base of a hilltop electrical pylon in Altadena, California—what residents say was the origin of the Eaton fire. Within minutes, high winds had carried the fire across the neighborhood and the sky was soon lit red with intense burning.

Americans affected by California wildfires will get tax filing extensions and other tax relief from the IRS. Here's what to expect.