SDG&E issued warnings to more than 100,000 customers in high-impact areas across San Diego County that their power could be shut off to help prevent wildfires.

Power was restored to all San Diego Gas & Electric customers Wednesday after thousands were left without electricity since the beginning of the week.

The National Weather Service has issued a Red Flag Warning due to an increased fire danger risk caused by Santa Ana winds and dry air in Southern California mountains and valleys. The warning goes into effect Monday morning and will last through Wednesday.