The National Weather Service has issued a red flag warning for much of Southern California because of unseasonably hot and dry weather. The critical fire weather conditions are also a concern for the operator of the state's electricity grid.
National Weather Service forecasters say a combination of strong winds, low relative humidity and warm temperatures will create extreme fire conditions through Friday.
The service says temperatures are expected to be 10-to-20 degrees above average with record highs in some areas.
The operator of California's electrical grid says power use has been higher than normal for late September because of the warm weather.
Greg Fishman with the California Independent System Operator is concerned about the combination of high fire danger and increased demand on the grid.
"The fires don't even actually have to do damage to transmission lines, just the smoke, the heat, the particulate matter in the air can cause those lines to arc and to trip out of service," says Fishman.
Fishman says in terms of power demand they're not expecting any problems meeting electricity needs.