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SAN DIEGO (CNS) – San Diego County remained under a red-flag warning for extreme fire danger Tuesday, as gusty Santa Ana winds and low humidity combined to heighten the risk of wildfires in the mountains and western valleys, and some local utility customers had their electricity shut off as a precaution.

Fire crews around the county were staffed at full capacit because of the high fire danger.

“With this event having the offshore winds as well as critically low humidity levels throughout the region, we have augmented our normal staffing levels to help prepare for the potential for increased wildfires in the city of San Diego,” said Deputy Chief David Gerboth of the San Diego Fire-Rescue Department. 

All schools in the Alpine Union School District, Valley Center-Pauma Unified School District and the Warner Unified School District were shuttered Tuesday because of possible power outages, according to the San Diego County Office of Education.

The warning will remain in effect until 10 p.m. Tuesday in the mountains and the western valleys. A high-wind warning will also be in effect through noon in those areas.

Winds out of the east were expected to be between 30-40 mph, with gusts potentially reaching 60 mph in the mountains, according to the National Weather Service. The strongest winds were expected Tuesday morning, weakening slightly into the afternoon.

Humidity levels will drop to around 10%, with poor recovery expected overnight.

The red-flag warning means that outdoor burning should be avoided because any fires that develop will spread rapidly, according to the NWS. The high-wind warning advises that the gusty conditions may knock down trees or power lines, and travel will be difficult for high profile vehicles in wind- prone areas.

On Sunday, San Diego Gas & Electric warned that 50,483 customers in eastern San Diego County could face precautionary power shutoffs from Monday night through Wednesday, depending on the severity of the wind and potential for damage to power lines.

As of early Tuesday morning, 15,441 customers were without electricity in eastern San Diego County, with another 35,138 facing potential power shutoffs. The following communities were affected:

  • Alpine
  • Boulevard
  • Campo
  • Campo Reservation
  • Descanso
  • Escondido
  • Ewiiaapaayp Reservation
  • Jamul
  • Julian
  • La Jolla Reservation
  • La Posta Reservation
  • Manzanita Reservation
  • Mesa Grande Reservation
  • Pala
  • Palomar Mountain
  • Pauma Reservation
  • Pauma Valley
  • Potrero
  • Ramona
  • Rincon Reservation
  • San Pasqual Reservation
  • Santa Ysabel
  • Santa Ysabel Reservation
  • Valley Center
  • Viejas Reservation
  • Warner Springs

At 8 a.m. Tuesday, SDG&E will open one resource center each in Descanso, Julian, Potrero, Ramona and Valley Center. Those centers will remain open until 10 p.m. and offer access to water, Wi-Fi, ice, snacks, phone and medical device charging, water trucks for livestock and up-to-date information on outages. All five centers also have a drive-thru option.

The locations of the community resource centers can be found at

High temperatures Tuesday are forecast to reach 78 degrees near the coast, 80 inland, 83 in the western valleys, 76 near the foothills, 67 in the mountains and 78 in the deserts.

Conditions are expected to warm up Wednesday, then temperatures will drop slightly on Thursday and Friday, forecasters said.