NEW : All Texas wildfires are at least 50 percent contained , Mark Stanford says . NEW : A fire in Midland is blamed on a vehicle engine that exploded , he says . More than 2000 acres have burned in 71 fires in Texas , the state forest service says . Many homes have been reported destroyed .
NEW : All 21 wildfires are at least 50 % contained , Mark Stanford says . NEW : A fire in Midland is blamed on a vehicle tire that blew , he says . More than 136,000 acres have burned in 71 fires in Texas , the state forest service says . 78 homes have been reported destroyed .