During adverse weather conditions, backcountry areas are prone to have electricity cut because they are often located in or around wind corridors. For example, Sill Hill in the Cleveland National Forest is a location where SDG&E’s network of 222 weather stations reports wind speeds of 70 mph and higher when Santa Anas blow through.

San Diego Gas & Electric by Thursday had restored power to all customers affected by this week's Public Safety Power Shutoffs.

"Public Safety Power Shutoffs are approved by state regulators as an important safety tool of last resort to mitigate fire risk during dangerous weather conditions," SDG&E said. A map of current power outages can be found at sdge.com/outages. Officials said to never approach damaged infrastructure or downed power lines.

Thousands of Southern California Edison customers in Riverside County are experiencing power shutoffs as fires and winds trouble Southern California.

"Due to a new round of Santa Ana winds and elevated fire weather conditions impacting our region this week, San Diego Gas & Electric has initiated Public Safety Power Shutoffs in certain communities to help reduce wildfire risk and protect public safety,

Tens of thousands of San Diego Gas & Electric customers could lose electricity later this week due to public safety power shutoffs during another bout of potentially dangerous Santa Ana winds.

Tens of thousands of Southern California Edison customers are without power due to the dangerous red flag conditions, and more shutoffs could be coming to prevent any new wildfires.

Nearly 60,000 SDG&E customers in numerous parts of the county are being warned to prepare for potential Public Safety Power Shutoffs with a Red Flag Warning taking effect Monday afternoon.