Red flag warnings are triggered by a combination of dry wildland fuels, low humidity, and--worst of all -- wind. The National Weather Service has issued red flag warnings essentially from Shasta County to south of the San Francisco Bay area.

A Red Flag Warning is currently in place for portions of Shasta County and Tehama County and is expected to stay in effect through 11pm Saturday night.

Shasta County's red flag and wind advisories weren't enough to get it on the list.

Members of sensitive groups may experience more serious health effects, the district said.© 2020 www.redding.com. Now, it's considering turning off power to about 179,000, including in Tehama County.. Shasta County's red flag and wind advisories weren't enough … The Elkhorn Fire in Tehama County grew to nearly 47,000 acres and was 55% contained Monday, while a Red Flag Warning has been issued for the North State due to wind and high temperatures.

Related:Red Flag Warning issued as Tehama County fire approaches 47,000 acres.

The fire was being monitored by U.S. Forest Service officials and there was no estimate of containment, according to Inciweb. The National Weather Service has issued red flag warnings essentially from Shasta County to south of the San Francisco Bay area. As of Monday, 14 structures had been destroyed and 25 structures were threatened by the fires in Tehama and Glenn counties, according to Cal Fire. Your California Privacy Rights / Privacy PolicyThe fires have left much of the North State covered in smoke that has created unhealthy air for weeks this past summer.

There is also a Red Flag Warning going into effect at 11am today for the Sierra and Southern Cascades, and that is also projected to stay in place through 11pm Saturday night. Tehama County, like the rest of the valley, was under a red flag warning until 8 p.m. Monday. Sensitive groups may be affected by the air quality and heat, according to the National Weather Service. RED BLUFF — High winds Tuesday grew the Elkhorn Fire southwest of Red Bluff to 50,126 acres, but containment remained at 55 percent. A Fire Weather Watch is issued when weather conditions could exist in the next 12-72 hours. California. The alert is expected to last through Monday night.Residents are urged to stay indoors and limit outdoor activities on smoky days. Red Flag Warning issued as Tehama County fire approaches 47,000 acres: The Elkhorn Fire in Tehama County grew to nearly 47: Massive August fire now largest in California history at 471,000 acres and counting: The August Complex is burning in a remote area in and around Tehama County. Two weeks ago, Cal Fire said there were 1,500 structures threatened by the fire. All rights reserved.Crews battling fires in Northern California will not be getting much help from Mother Nature over the next few days.In the Glenn County zone, the Ivory Fire is holding at 4,500 acres and is expected to burn toward communities to the east.Officials said the Tathum and Cold Springs fires have merged and is burning about 5 miles west of Paskenta.All evacuation centers have been closed because the areas where the fires in the complex are burning have few residents, officials said.The Tehama-Glenn Lightning Complex, which includes the Elkhorn Fire burning in western Tehama County, grew slightly to 28,617 acres, according to Cal Fire.The R-Wild Horse Ranch along Highway 36 in Platina was under a mandatory evacuation order starting Thursday, too.Mary Ellen Place; Weemasoul Road; Goat Camp; Alford Place; Vestal Road; Pete Hoff Place; El Rancho Rio Frio; Greasewood Hill; Haven Place; Pettyjohn Place; Cold Fork; Burrill Homestead; Hammer Place; Ellin Trail; Lanyan Trail; Halley Grade; Elkhorn Peak; Banfield Place; Sunflower Jeep Trail; Heitman Place; Stevenson Peak; Rocky Peak; Skinner Mill Place; Bayles Place; Hammer Loop Road; Shackleford Place; Forest Route 26N01; Forest Route 26N02; Forest Route 26N03, and C281.Crews at Elkhorn Fire gain one advantage despite hotter weather ahead"There is such a small population in those areas, so most of the people have other places to go," said Dave Doughty of Tehama County Fire.

A Red Flag Warning is issued for weather events which may result in extreme fire behavior that will occur within 24 hours. "That's true for the entire state," he said.Map traces current fires burning across state in real-timeThere is a slight chance of thunderstorms on Monday with a high near 100.The National Weather Service has issued red flag warnings essentially from Shasta County to south of the San Francisco Bay area.Since Aug. 15, there have been about 12,000 lightning strikes — including more than 100 that occurred Friday.

In addition to the fires in Tehama and Glenn counties, there were also several lightning-caused blazes in Trinity County.The fires were ignited by a lightning storm that moved over large parts of the state Aug. 15.