Wildfire in Los Angeles National Forest

Dangerous fires spreading northeast of L.A. has already burned 4,000 acres.
3:00 | 09/04/12

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Transcript for Wildfire in Los Angeles National Forest
developing story northeast of los angeles. The red cross setting up an evacuation center as the massive wildfire marches out of control. 4,000 acres have been burned. And david wright is on the front lines to show us just how dangerous this fire is becoming. Good morning to you, david. Reporter: Good morning, josh. We're at a staging area for some of the 500 firefighters that are battling this blaze. That glow you see over my shoulder, that's not the sunrise. That's the fire over the ridge. Labor day weekend up in smoke in the san gabriel valley. Campers, hikers and labor day picnickers all had to evacuate. We saw the smoke next to us. And we started packing. Reporter:12,000 visitors normally come here for the holiday weekend. Three hikers were stranded behind the fire lines. A rescue helicopter found them and hoisted all three to safety in two hours. The steep terrain makes the fire spread quickly. About 4,000 acres consumed so far. And it's tough to fight. The game plan is to at least get this lower area secure on this road. And then, start working on our planes with the aerial drops. Reporter: Aerial bombardments of fire retardant seems to be helping. So have the winds, which has dropped since monday. The wind here can be unpredictable. And the brush I as dry as kindling. The area we're standing is one of the few inhabited parts of the park. ABOUT 50 R.V.s ARE HERE. All of these people told to evacuate. Most of them didn't. But they may have second thoughts when they -- if those flames get much closer, josh. David, thank you for that.

This transcript has been automatically generated and may not be 100% accurate.

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