PG&E is warning customers in its service region of possible power outages in the coming days as the weather moves into Northern California.

Temperatures are expected to drop late Tuesday as a light weather system brings some chances of showers at higher elevations.

Strong winds and low humidity are the biggest concerns after that system. A red flag warning will be in effect for the Sacramento Valley and Bay Area from Thursday evening through Saturday, according to the National Weather Service.

The high fire danger has prompted PG&E to list Thursday through Saturday as days when power shutoffs are possible for public safety.

Specific addresses where closures could take place have not yet been listed. The counties that could be affected by the closures could vary from day to day, PG&E shows on the PSPS website.

Possible power outages on Thursday, October 17

Alameda, Colusa, Contra Costa, Glenn, Lake, Mendocino, Napa, Shasta, Solano, Sonoma, Tehama and Yolo.

Possible power outages on Friday, October 18 and Saturday, October 19

Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, El Dorado, Fresno, Glenn, Lake, Madera, Mariposa, Mendocino, Merced, Monterey, Napa, Nevada, Placer, Plumas, San Luis Obispo, Santa Barbara, Shasta , Sierra, Solano, Sonoma, Stanislaus, Tehama, Tuolumne and Yolo.

Possible power cuts on Sunday, October 20

Alpine, Amador, Butte, Calaveras, Colusa, El Dorado, Fresno, Glenn, Lake, Madera, Mariposa, Mendocino, Napa, Nevada, Placer, Plumas, Shasta, Sierra, Tehama and Tuolumne.

According to PG&E, no shutoffs are planned for Tuesday and Wednesday.