Hurricane could threaten Puerto Rico as Category 2
                                
                                
                                    (Newser) -
                                    Caribbean oil refineries are under threat from Hurricane Omar, whose 85-mph winds roared through St. Croix today, Bloomberg reports. It could hit the Virgin Islands, home to one of the hemisphere's largest refineries, as a Category 2 storm tomorrow. Puerto Rico may be in line for 20 inches of rain...