Fire officials announced that containment of the massive Holy Fire has reached 51 percent, offering more hope to residents of Riverside and Orange counties, even as thousands of homes remained threatened. Full containment is expected this Friday. The wildfire's acreage inched upward to 22,714 with more than 1,500 firefighters on the front lines of the inferno that has already destroyed 12 structures in the Cleveland National Forest. As the fire entered its seventh day, helicopters and airplanes continued to drop fire retardant on flames burning in otherwise inaccessible terrain. In some neighborhoods, entire blocks were covered with red Phos-Chek.