According to officials at the Orange County Emergency Operations Center, the voluntary evacuation order will go into effect at 10 a.m. for residences east of 30311 Silverado Canyon Road. The orders coincide with a flash flood watch issued by the National Weather Service that will be in effect from 10 a.m. Tuesday until 4 a.m. Thursday.
A Red Cross shelter is expected to be established in the area, but details have not yet been released.
The alert directs residents to remove vehicles, trash bins and other obstructions from streets -- both to ensure access for emergency vehicles and to prevent the items from being damaged or washed away in a mudslide.
No evacuation orders have been issued for the affected area -- which includes all properties north of Sierra Madre between the western city boundaries of Azusa/Glendora to the eastern boundary of properties on the west side of the Little Dalton Wash.
According to Glendora officials, forecasts indicate that the Colby Fire burn area cold receive 1-2 inches of rain on Tuesday, including possibly intense downpours of a half-inch per hour. More rain is anticipated Wednesday
City officials reminded residents not to cross flowing water or mud, and protect themselves from debris flows on their property by going to the highest point in the house or the middle of a single-story residence.
The Colby Fire, which began Jan. 15, 2014, scorched 1,992 acres, destroyed five homes and damaged 17 others. More than 3,500 people were evacuated during the height of the blaze.