Two fires raging in Lake and Colusa counties had grown to nearly 8,000 acres but ramped-up firefighting efforts Wednesday were slowing their spread.

The fires are now 70 percent contained, up from 60 percent on Tuesday, said Cal Fire spokeswoman Cherie Alver. Full containment is expected on Monday.

There are now 1,219 firefighters battling the two blazes, the Wye fire in northeastern Lake County and the Walker fire, just over the Colusa County line from the other, Alver said.

"I think they're having some good efforts to strengthen the control lines," she said.

The fires have destroyed two residences and one outbuilding and damaged two homes, Alver said.

Three people have been injured. Alver said no details are available on the injuries or the homes.

The causes of the fires remain under investigation, she said.

The fires ignited several miles apart along Highway 20 east of Clearlake Oaks at about 4 p.m. Sunday. Hundreds of Spring Valley residents were evacuated Sunday but were allowed to return home Monday night.

In Colusa County, Wilbur Hot Springs area residents were allowed home on Wednesday, Alver said.

Highway 20 between Highway 53 and Highway 16 reopened Wednesday afternoon to two-way traffic but vehicles must drive at speeds of no more than 45 mph.

You can reach Staff Writer Glenda Anderson at 462-6473 or