Hurricane Dorian struck the northern Bahamas on Sunday as a catastrophic Category 5 storm, its 185 mph winds ripping off roofs and tearing down power lines as hundreds hunkered in schools, churches and other shelters.The second-strongest Atlantic hurricane since 1950, Dorian hit land in Elbow Cay in the Abaco Islands after authorities made last-minute pleas for those in low-lying areas to evacuate. But officials recognized there were not many structures on higher ground on the largely flat archipelago southeast of Florida.Millions from Florida to the Carolinas kept a wary eye on the slow-moving Dorian amid indications it would veer sharply northeastward after passing the Bahamas and track up the U.S. Southeast seaboard. But authorities warned that even if its core did not make U.S. landfall and stayed offshore, the potent storm would likely hammer U.S. coastal areas with powerful winds and heavy surf.The National Hurricane Center in Miami said Dorian’s maximum sustained winds at landfall were 185 mph (295 kph), up from 175 mph (281 kph). It is moving west at 7 mph (11 kph). “Catastrophic conditions” are occurring in The Abaco Islands and expected across Grand Bahama later in the day, the center said.