Evacuation orders were lifted Wednesday night as crews moved forward fighting the Grand Fire in Chino Hills, fire officials said.
The vegetation fire started near Grand Avenue Park around 7 p.m.
An hour later, the fire had burned 30 acres, prompting officials to urge residents living on Mill Stream Drive, Falling Star Lane, Valley View Lane and Sweet Grass Lane to leave their homes immediately.
One firefighter suffered a minor injury and was taken to a hospital, according to Cal Fire.
Chino Valley Fire reported shortly before 8 p.m. that the fire had the potential to spread to 200 acres and was threatening structures. Ground crews and water-dropping helicopters worked to control the fire.
At 9:30 p.m., officials reported the fire remained at 30 acres amid more favorable conditions: cooler nighttime temperatures and higher humidity.
Around 10 p.m., all evacuation orders and warnings were lifted and all planes were cleared, officials said. Grand Avenue between Grand Avenue Park and the city line remained closed until further notice.
The National Weather Service warned Wednesday that moderate to locally strong winds and low humidity would raise fire risk in areas of inland Los Angeles County this week. Chino Hills is just east of the Los Angeles County border.
The highest fire risk is currently expected on Saturday and Sunday, when winds of 15 to 30 mph are expected, with isolated gusts of up to 50 mph.
