Detwiler Fire Update From Mariposa County Wednesday, July 19, 2017 | Sacramento, CA Listen / download audio Update RequiredTo play audio, update browser or Flash plugin. CAL FIRE / Courtesy The Detwiler Fire in Mariposa County has exploded in size at more than 45,000 acres and forced the city of Mariposa to evacuate Wednesday afternoon. The blaze is one of dozens continuing to burn around the state. Capital Public Radio's Bob Moffitt and CALFIRE spokesman Scott McLean share the latest on the blaze.