HOUSTON (AP) — Harvey intensified into a hurricane Thursday and steered for the Texas coast with the potential for up to 3 feet of rain, 125 mph winds and 12-foot storm surges in what could be the fiercest hurricane to hit the United States in almost a dozen years. Forecasters labeled Harvey a “life-threatening storm” that posed a “grave risk.” Millions of people braced for a prolonged battering that could swamp dozens of counties more than 100 miles inland. Landfall was predicted for late Friday or early Saturday between Port O’Connor and Matagorda Bay, a 30-mile (48-kilometer) stretch of coastline about 70 miles (110 kilometers) northeast of Corpus Christi Harvey grew quickly Thursday from a tropical depression into a Category 1 hurricane.