Full containment of Madre fire near Azusa forecast by Oct. 2

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A DC-10 drops retardant on the Madre fire in the Angeles National Forest near Azusa. (Irfan Khan / Los Angeles Times)

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A Super Scooper makes a water drop on the Madre fire in the Angeles National Forest near Azusa. (Irfan Khan / Los Angeles Times)

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A Los Angeles County firefighter monitors the brush fire on the hills of the San Gabriel Canyon area above Azusa, (Ricardo DeAratanha / Los Angeles Times)

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A helicopter monitors the brush fire on the hills of the San Gabriel Canyon area above Azusa. (Ricardo DeAratanha / Los Angeles Times)

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A U.S. Forest Service firefighter at the flood control basin watching the brush fire on the hills of the San Gabriel Canyon. (Ricardo DeAratanha / Los Angeles Times)

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A U.S. Forest Service firefighter pulls on a hose. (Ricardo DeAratanha / Los Angeles Times)

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A helicopter drops water during a brush fire in San Gabriel Canyon above Azusa. (Ringo H.W. Chiu / For The Times)

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A brush fire burns along ridge lines near San Gabriel Canyon Road in Azusa. (Michael Robinson Chavez / Los Angeles Times)

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Brush fire sends a plume of smoke into the sky. (Gary Friedman / Los Angeles Times)

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People watch as a smoke plume from a brush fire rises in San Gabriel Canyon above Azusa. (Ringo H.W. Chiu / For The Los Angeles Times)

By Ari Bloomekatz

Sept. 24, 2013 11:59 AM PT

The Madre fire burning in the mountains above Azusa will probably not be fully contained until Oct. 2, authorities said Tuesday.

The blaze was only 5% contained Tuesday morning and had burned through 200 acres of brush and other fuel as crews tried to gain the upper hand.

An aerial assault was underway Tuesday morning.

PHOTOS: Crews battle Madre fire in Azusa

The number of personnel battling the blaze also tripled to 450 from Monday to Tuesday and firefighters were hoping that low winds -- churning at about 10 miles per hour -- and higher relative humidity of 19% would help their efforts, according to the U.S. Forest Service.

“That’s not too bad,” U.S. Forest Service spokesman Shaun Rollman said of the wind. And he added that “the humidity’s in double digits, so that’s a good thing.”

The fire started Monday at about 6 p.m. in San Gabriel Canyon north of Highway 39.

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Twitter: @aribloomekatz | Facebook

ari.bloomekatz@latimes.com