Sept. 30 (UPI) -- Forecasters early Wednesday were warning of dangerous surf and "life-threatening" rip currents at beaches of the northern Caribbean, Bahamas, Bermuda and much of the U.S. East Coast as Hurricane Humberto continued its way north across the Atlantic. With maximum sustained winds of 80 mph, Humberto remained a Category 1 hurricane as of 5 a.m. AST Wednesday, the National Hurricane Center said in its morning update . The storm was located about 280 miles north-northwest of Bermuda