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The fire has scorched at least 131 square miles (339 square kilometers) of Santa Barbara and San Luis Obispo counties, with just 9% containment. It surpassed the 126-square mile (326-square-kilometer) Madre Fire, which erupted last month in southeastern San Luis Obispo County, as the state's largest fire of 2025.

Crews working in steep, inaccessible terrain will be dealing with temperatures in the mid-90s (35 Celsius) on Wednesday and above 100 (38 Celsius) on Thursday, said Capt. Scott Safechuck with the Santa Barbara County Fire Department.

“We have hot weather, and we have low relative humidity,� Safechuck said Wednesday. “So we expect extreme fire behavior.� Luckily, winds are expected to remain relatively calm, he said.

will be elevated through the weekend across much of inland California as the heat wave intensifies. The southern part of the state has seen very little rain, drying out vegetation and making it “ripe to burn,� the National Weather Service for Los Angeles warned in a statement. Triple-digit temperatures (around 38 Celsius) are forecast for the Sacramento Valley.

A dozen major blazes are burning statewide, and officials warn the threat will only grow in August and September, typically the most dangerous months for wildfires. Across the Sierra and northern parts of California, months of little to no rain are “pushing conditions toward critical levels faster than usual,� according to a wildfire forecast by the California Department of Forestry and Fire Protection, or Cal Fire.

“In Southern California, the threat is driven by persistent drought, high grass loads, and weakening coastal moisture,� Cal Fire said.

More than 2,200 personnel are battling the Gifford Fire, which grew out of at least four smaller that erupted Friday along State Route 166, forcing closures in both directions east of Santa Maria, a city of about 110,000 people. The causes of the fires are under investigation.

Flames are racing through a vast, mostly unpopulated region that includes forestland, ranches, large canyon properties and agricultural parcels growing wine grapes and strawberries.

The weather service warned of from spreading smoke that could affect much of southwest California.

Officials reported four injuries, including a firefighter who was treated for dehydration. Over the weekend, a motorist was hospitalized with burn injuries after getting out of his vehicle and being overrun by flames. And two contract employees assisting firefighters were also hurt when their all-terrain vehicle overturned.