THE BOND FIRE has scorched over 7,200 acres in the Silverado Canyon area as of Thursday afternoon (OCFA image).

This is a developing story. Check back for updates and details.

UPDATE: The Bond Fire in the Silverado Canyon areas has burned an estimated 7,200 acres and is considered 0 percent contained as of 4:40 p.m. Thursday. The blaze is confirmed as having started as a structure fire that spread to nearby vegetation,

According to Orange County Fire Authority, 25,000 residents have been evacuated.

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Whipped by hot Santa Ana winds, a major brush fire in the Silverado Canyon area has consumed over 4,000 acres with zero percent containment.

According to the Orange County Fire Authority, the blaze – called the Bond Fire – started at around 10:15 p.m. on Wednesday. Mandatory evacuation orders are out for residents of Modjeska Canyon. Cowan Heights and Lemon Heights are under evacuation warnings.

Over 500 firefighters, on the ground and in the air, are battling the flames. At least one structure has been damaged, according to the OCFA; others may also have been affected.

According to the National Weather Service, gusts of wind as high as 50 miles an hour are predicted for today. Windy conditions are expected to continue through Friday night, with calm conditions by Saturday.

The Orange County Emergency Operations Center hotline number is (714) 628-7085. For evacuation details, go to http://www.ocsheriff.gov/bondfire .