A brush fire in Mariposa County showed extreme behavior as it exploded in size to 1,600 acres Friday night, prompting authorities to expand evacuation zones.
Around 3:30 p.m., about an hour and a half after it started, the Oak fire was 60 acres and 0% contained, according to the California Department of Forestry and Fire Protection. An hour later, it had grown to 611 acres. By 5:38 p.m., the blaze was 1,300 acres and remained uncontained, Cal Fire said.
Shortly before 7 p.m., the blaze had grown to about 1,600 acres, according to a Mariposa County fire map.
