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Southern California Edison shut off power in parts of L.A., Ventura, San Bernardino and Kern counties Thursday as part of a statewide effort to prevent wildfires amid windy and dry weather conditions.

About 12,900 customers have had their service cut as of noon, according to the utility:

Kern County Tehachapi Unincorporated communities of Bird Springs, Horse Canyon, Loraine, Sand Canyon and Twin Oaks

Los Angeles County Palmdale Unincorporated communities of Agua Dulce and Acton, Boiling Point, White Heather Unincorporated communities of Fern Ann Falls, Twin Lakes, Deer Lake Highlands, Chatsworth Lake Manor, Santa Susana Knolls

San Bernardino County Fontana Rancho Cucamonga Rialto San Bernardino Unincorporated communities of Lytle Creek Unincorporated communities of Muscoy, Devore, Glen Helen Regional Park Unincorporated communities of Etiwanda, Grapevine Canyon, San Sevain Flats Unincorporated communities of Devils Canyon, Serrano Village, Kendall

Ventura County Fillmore Simi Valley Unincorporated communities of Santa Susana



RELATED: How to Prepare for a Power Outage During Wildfire Weather

About 787 customers in Ventura County have lost power, county spokeswoman Natalie Hernandez said.

The Fillmore, Moorpark and Simi Valley areas are affected, according to the county’s website. This has forced the closure of the Fillmore Unified School District on Thursday and Friday.

Cal State University San Bernardino also canceled classes on Thursday.

Others in the following communities who have not lost power are under a shutoff watch:

Los Angeles County (about 49,024 customers) Altadena Lancaster Azusa Covina Glendale Glendora Los Angeles Palmdale La Cañada Flintridge La Crescenta Montrose Malibu Chatsworth San Fernando Santa Clarita Sun Village Unincorporated areas including Acton, Agua Dulce, Boiling Point, White Heather, Sunland, Tujunga, La Crescenta, Montrose, Wildwood, Canyon Country, Newhall, Forest Park, Sleepy Valley, Del Valle, Leona Valley, Plum Canyon, Alpine, Merrie Dell, Indian Springs, Juniper Hills, Valencia, Stevenson Ranch, Mount Wilson, Valyermo, Paradise Springs, Humphreys, Placerita Canyon State Park, Littlerock, Caswell, Sandberg, Mount Baldy, Mint Canyon, Kagel Canyon, north of Altadena, Pearblossom, Quartz Hill, north of Lake Hughes Road, Lake Hughes, Green Valley, Elizabeth Lake, Sylmar, Portal Ridge, Three Points, Upper Big Tujunga Canyon, and near Antelope Valley and unincorporated areas of Chatsworth, Sylmar and Los Angeles County

(about 49,024 customers) San Bernardino County (about 41,280 customers) Big Bear Calimesa Cherry Valley Fontana Hesperia Highland Rancho Cucamonga Rialto San Bernardino Upland Yucaipa Yucca Valley Unincorporated including Doble and Upper Holcomb Valley, Cajon Pass, Devore, Etiwanda, Lucerne Valley, Lytle Creek, Running Springs, Lake Arrowhead, Cedar Pines Park, Valley of Enchantment, Crestline, Valley View Park, Joshua Tree, Homestead Valley, Crestline, Oak Hills, Muscoy, Green Valley Lake, Morongo Valley, Oak Glen, Mount Baldy, Arrowhead Equestrian and unincorporated areas of San Bernardino County and Yucca Valley

(about 41,280 customers) Ventura County (about 20,449 customers) Fillmore Camarillo Moorpark Simi Valley Santa Rosa Valley Ventura Unincorporated areas including Sespe, Oak Village, north of Moorpark, Piru, Elkins Ranch Golf Course, Leesdale, north Fillmore, Santa Susana, Stauffer, Sycamore Canyon, Solromar and unincorporated areas of Piru as well as communities near Telegraph Road

(about 20,449 customers) Riverside County (about 22,325 customers) Banning Beaumont Calimesa Hemet San Jacinto Menifee Moreno Valley Perris Riverside Unincorporated Riverside County including the communities of Whitewater and Bonnie Bell, Banning Pass, Cabazon, Cherry Valley, Owl, portions of Desert Hills Outlet Mall, North Palm Springs, Gilman Hot Springs, Lakeview, Nuevo, Mons, Mead Valley, Eden Hot Springs, Mountain Center, Good Hope and unincorporated ares of Beaumont, Banning and Riverside County

(about 22,325 customers) Orange County (about 7,250 customers) Rancho Santa Margarita Orange Unincorporated areas including North Tustin

(about 7,250 customers) Kern County (about 19,582 customers) Tehachapi Unincorporated areas including Frazier Park, Lake of the Woods, Pine Mountain Club, Bodfish, Lake Isabella, Sand Canyon, Keene, Camp Owens, Kernville, Wofford Heights, Golden Hills, Alpine Forest, Weldon, Onyx, Canebrake, Monolith, Bear Valley Springs, Bella Vista, Lebec, Stallion Springs, and unincorporated areas of Kern County, Walker Basin and Kernville

(about 19,582 customers) Mono County (about 13, 177 customers) Mammoth Lakes Unincorporated areas near Bishop including the community of Paradise and portion of Swall Meadows, Sunny Slopes, Mammoth Lakes (Trails, Core, North, Slopes), June Lake Village, Loop, Crestview, Dunderberg Mill, Mono Lake, Mono City, North Conway, Willow Springs, Bridgeport Feeder, Old Mammoth, Mammoth Lakes Basin, Lee Vining, Lee Vining Canyon, Falls Creek Tract and Bridgeport Valley to Twin Lakes

(about 13, 177 customers) Inyo County (about 682 customers) Unincorporated areas near Bishop including Aspendell and Round Valley and southeast of Bishop

(about 682 customers) Tulare County (about 108 customers) Unincorporated areas including Fairview and Johnsondale and unincorporated communities of Tulare County

(about 108 customers)

SoCal Edison’s website has maps of communities affected and the latest updates on outages. The Los Angeles Times also has a search tool that lets users enter their address to see if they’re under a warning.

Down south, San Diego Gas & Electric has alerted some 30,000 of its customers in back-country areas that they could lose service but has not cut electricity for any community as of Thursday morning.

Where are the winds so far? Here is a map showing the gusty winds that have developed first in the mountain pass corridors #santaanawinds #cawx #firedanger these winds will continue to expand southward and increase along with much drier air pic.twitter.com/NQVB9wS6Jv — NWS San Diego (@NWSSanDiego) October 10, 2019

Meanwhile, Pacific Gas & Electric has implemented unprecedented power cuts for more than half a million homes and businesses it serves in Central and Northern California, including the Bay Area but excluding the city of San Francisco.

Speaking Thursday evening, Gov. Gavin Newsom railed against utilities’ decision to cut power. He specifically called out PG&E for what he said was decades of mismanagement, “greed and neglect” that created the extreme situation.

“What has occurred in the last 48 hours in unacceptable,” Newsom said, noting that kids were staying home from school and some people couldn’t access water. “We’re seeing a scale and scope of something that no state in the 21st century should experience. What’s happening is unacceptable, and it’s happened because of neglect.”

Newsom also said the state had to help PG&E get its website back up after it was overloaded by customers seeking information on the shutoffs.

More in Southern California could still have their electricity impacted with a red flag warning effective through 6 p.m. Friday for much of Los Angeles, Ventura, San Bernardino, Orange and Riverside counties.

Strong winds were expected to blow east to northeast with up to 50 to 75 mph gusts in some areas.

In addition to utility companies, city officials also ramped up wildfire prevention efforts.

Fire departments across the region have been on high alert, with some increasing personnel ready to respond to blazes.

In a move made easier by a city ordinance passed earlier this year, Los Angeles police planned to clear some homeless camps in fire zones.

The city also urged motorists to check for parking restriction signs to clear roads for emergency responders, and transportation officials warned that some traffic signals in L.A. and Ventura counties could be affected by power outages.

In the event of a blackout, lights will operate normally for about three hours before they turn into “red flash” signals, according to Caltrans. In case an outage lasts more than six hours and signals go black, drivers should treat them as stop signs, the agency said.

ADVISORY: @CaltransDist7 traffic signals on state routes in #LosAngeles and #Ventura counties may be affected by power outages. Signals will cycle normally for about 3 hours, then cycle to “red flash." If outage lasts more than 6 hours, signals will go black — treat as STOP signs pic.twitter.com/KqDfvCHFKt — Caltrans District 7 (@CaltransDist7) October 10, 2019

#RedFlag As of 8AM this morning, the City of Los Angeles enacted the Red Flag Parking Restricted Parking Program due to the forecasted high winds and low relative humidity To find the current status, check https://t.co/dTQJD6l0WN Map of the zones affected, https://t.co/y32l9HS5Sg pic.twitter.com/kUf4NXQkxT — LAFD Talk (@LAFDtalk) October 10, 2019

How do you stay safe during high fire danger? Here are a few tips to use during the Santa Ana winds Thursday and Friday! #SoCal #CAwx #CAfire pic.twitter.com/GaqGEQ0VCb — NWS Los Angeles (@NWSLosAngeles) October 10, 2019

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