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Sierra Madre officials issue 'green alert' for possible debris and mud flows

October 6, 2010 |  1:16 pm

Sierra Madre city officials issued a "green flag" alert Wednesday, warning residents to follow weather reports and be ready for evacuation due to mudslides or debris flow resulting from downpours.

The alert came as the National Weather Service predicted an 80% chance of rain for the foothill areas of the San Gabriel Mountains. The warning affects residents of the Upper and Lower Canyon as well as those whose properties abut the hillsides, city officials said.

The three-flag alert system was developed after the April 2007 Santa Anita fire that scorched hillsides and left communities below vulnerable to mud and debris flows.

A yellow flag alert means possible flows of mud and debris at specific locations requiring that vehicles be cleared from the streets and warning residents to be ready to evacuate.

In a red flag alert, residents are advised to immediately evacuate.

-- Andrew Blankstein