Crews are battling a wildfire in Butte County, about 70 miles (113 km) north of the California capital, Sacramento, Xinhua news agency reports.
About 28,000 residents near Oroville were placed under evacuation orders on Wednesday due to the rapidly growing fire, according to the California Department of Forestry and Fire Protection (Cal Fire).
The blaze, called the Thompson Fire, broke out just before noon Tuesday and grew to more than 3 square miles (10.6 square kilometers) by Wednesday morning, with no containment.
Smoke from the fire has blown toward Sacramento and hazy skies are reportedly visible over the city.
The largest current blaze, the Basin Fire, was 26 percent contained after burning about 22 square miles (56 square kilometers) of the Sierra National Forest in eastern Fresno County since it erupted on June 26.
California's heat was expected to spread from north to south during the week, focusing on interior areas such as the Sacramento and San Joaquin valleys and the southern desert.
An extreme heat warning is expected to last through Sunday night in Sacramento, with temperatures forecast to reach between 105 degrees and 115 degrees (40.5 and 46.1 Celsius).
As of Wednesday morning, 2,934 wildfires were burning in California, burning 139,590 acres (565 square kilometers), Cal Fire said.
Red flag fire warnings were issued throughout the state. The state governor's office announced late Tuesday that federal funding had been approved to help firefighting efforts.
Utility Pacific Gas & Electric implemented a public safety power shutoff in parts of 10 counties to prevent wildfires caused by downed or damaged power lines.
About 28,000 residents near Oroville were placed under evacuation orders on Wednesday due to the rapidly growing fire, according to the California Department of Forestry and Fire Protection (Cal Fire).
The blaze, called the Thompson Fire, broke out just before noon Tuesday and grew to more than 3 square miles (10.6 square kilometers) by Wednesday morning, with no containment.
Smoke from the fire has blown toward Sacramento and hazy skies are reportedly visible over the city.
The largest current blaze, the Basin Fire, was 26 percent contained after burning about 22 square miles (56 square kilometers) of the Sierra National Forest in eastern Fresno County since it erupted on June 26.
California's heat was expected to spread from north to south during the week, focusing on interior areas such as the Sacramento and San Joaquin valleys and the southern desert.
An extreme heat warning is expected to last through Sunday night in Sacramento, with temperatures forecast to reach between 105 degrees and 115 degrees (40.5 and 46.1 Celsius).
As of Wednesday morning, 2,934 wildfires were burning in California, burning 139,590 acres (565 square kilometers), Cal Fire said.
Red flag fire warnings were issued throughout the state. The state governor's office announced late Tuesday that federal funding had been approved to help firefighting efforts.
Utility Pacific Gas & Electric implemented a public safety power shutoff in parts of 10 counties to prevent wildfires caused by downed or damaged power lines.
