STEHEKIN — Six homes are threatened and a campground and trail closed after a lightning-caused fire southeast of Stehekin grew from 50 to 250 acres since Monday.

Twenty firefighters and two helicopters are battling the Moore Point Fire, seven miles from Stehekin. Another crew of 20 firefighters is expected to arrive today to help fight the fire, which is burning on both private land and in the Lake Chelan Sawtooth Wilderness.

A Chelan County Sheriff’s sergeant this afternoon headed up Lake Chelan to notify owners of two homes they should leave immediately, and four others that they should be ready to go at a moment’s notice.

The two homeowners who are being warned they should leave stayed at their residences Monday night, and firefighters concentrated their efforts on protecting those homes, said Elka Missal, spokeswoman for the Chelan Ranger District.

She said standing dead trees from the 2011 Rex Creek Fire pose a high risk to firefighters, along with steep terrain and the possibility of rolling material.

The fire was ignited by Sunday night’s lightning storm south of the Moor Point campground, on the face of Round Mountain.

It grew more than expected Monday night.

“It actively burned last night until at least midnight,” Missal said on Tuesday, adding, “It didn’t calm down like you would expect a fire to.”

The Moore Point Campground and part of the Lakeshore Trail, between Meadow Creek and Flick Creek Campground, are closed.

The agency plans to fly over the blaze again today to see where the fire has grown.

K.C. Mehaffey: 997-2512