As a wildfire near Los Angeles was brought under control, firefighters were being redeployed to battle the Thomas Fire northwest of America's second-largest city.
The Thomas Fire has burned 230,500 acres (93,300 hectares) since it erupted a week ago and has been only 15 percent contained, the Calfornia Fire Department (Cal Fire) said.
The blaze spread over the weekend in the mostly uninhabited Los Padres National Forest, Cal Fire said, and was threatening the coastal towns of Montecito, Summerland and Carpinteria, south of the historic city of Santa Barbara, population 91,000.
"Our house is under threat of being burned," DeGeneres said of her Montecito home.
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"We just had to evacuate our pets," she said on Twitter. "I'm praying for everyone in our community and thankful to all the incredible firefighters."
"Praying for my town," Santa Barbara resident Lowe wrote on Twitter. Fires closing in. Firefighters making brave stands. Could go either way. Packing to evacuate now."
May Osher, a 66-year-old retired schoolteacher in Carpinteria, told the Los Angeles Times she had put photo albums and pet supplies in her car and was ready to evacuate if told to do so.
With over 230,000 acres of land scorched, the Thomas Fire is the fifth-largest in the history of California, according to the Los Angeles Times.
Cal Fire said 800 buildings have been destroyed by the fire, which is being fueled by dry brush and strong and unpredictable Santa Ana winds.
"Gusty northeast winds will cause the fire to threaten areas of the city of Santa Barbara," Cal Fire said early Monday.