SAN DIEGO - A monitored brush-clearing fire in Anza-Borrego Desert State Park spread beyond its intended boundaries Thursday, scorching hundreds of acres and prompting the closure of a nearby rural highway but posing no structural threats.
An unexpected wind shift caused the San Felipe-area prescribed blaze to begin growing larger than planned about midday, moving across remote, rugged terrain east of Julian and southwest of Borrego Springs, according to Cal Fire.
As of early evening, the burn area had expanded to about 750 acres, more than seven times the intended size, the state agency reported. Ground and airborne personnel had the blaze about 30 percent contained.
Authorities closed county Highway S2 between state Route 78 and Montezuma Valley Road as crews worked to regain control of the flames.
No injuries were reported.
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