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Flash-flood warning issued for areas east of Palm Springs [Updated]

December 22, 2010 | 12:33 pm

A flash-flood warning has been issued for areas east of Palm Springs that include Twentynine Palms, Joshua Tree National Park and the Morongo Valley.

[Updated at 12:45 p.m.: A flash-flood warning has been extended to the eastern San Gabriel Valley, including the cities of Azusa, Walnut and Diamond Bar. Earlier, the National Weather Service issued a warning for La Crescenta and La Cañada-Flintridge areas.

“Rain rates near 1 inch per hour will create flooding and dangerous conditions for the next few hours,” the weather service said.

Areas burned by the Station and Morris fires were under the warning. The warning area includes Mount Baldy, Falling Springs and Big Pines.]

Click here for an interactive explainer on mudslides "Excessive runoff from heavy rainfall will cause fast rising water and flash flooding of washes," warned the National Weather Service office in Las Vegas. "When flash flooding is observed, move quickly to higher ground to escape flood waters.

"It only takes 18 inches of swiftly moving water to sweep a vehicle off the road and less than six inches of swiftly moving water to sweep a person off their feet," the weather service said.

A flash-flood warning means flooding is imminent or occurring.

RELATED:

Sheriff's officials warn foothill communities to keep roads clear

Dramatic rescues, evacuations, mud damage in SoCal rainstorm

Bridge collapses, motorists trapped, homes inundated in San Bernardino County

-- Rong-Gong Lin II

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