Southern California Edison cut power to about 3,300 homes and business on Sunday and warned it could shut off an additional 171,000 customers due to dangerous fire weather conditions buffeting the Los Angeles region.

The utility said on Friday that it may need to preemptively cut power this weekend because of a forecast of dry Santa Ana winds, which can knock down trees and power lines and cause any fires that spark to spread quickly. The National Weather Service issued a red flag fire warning for Los Angeles and Ventura counties through Monday evening with widespread wind gusts of 40 to 60 miles per hour (64 to 97 kilometers per hour) through mountain valleys.