MIAMI , Florida ( CNN ) -- Hurricane Ike grew from a Category 1 into a menacing Category 4 storm in about six hours Wednesday as it fed on the warm waters of Atlantic , the National Hurricane Center said . An infrared image from a NOAA satellite shows Ike swirling in the Atlantic on Wednesday night . `` Ike is an extremely dangerous Category 4 hurricane '' with 135-mph sustained winds , the center said in its 11 p.m . ET advisory . Although it is likely to lose some strength during the next few days , Ike is forecast to regain Category 4 status by Monday , the center said . `` It is too early to determine what , if any , land areas might be affected by Ike , '' the hurricane center said . But the center 's potential four- to five-day track for Ike puts it anywhere from north of Jamaica to the coast of South Florida on Monday . iReport.com : Are you in Ike 's path ? At 11 p.m . ET Monday , Ike was moving west-northwest through the Atlantic Ocean . The storm will be over open water for two days , forecasters said . Earlier Wednesday , Ike intensified into the fifth hurricane of the 2008 Atlantic season when its winds reached 80 mph . But before Ike can reach into the Caribbean or threaten Florida , Tropical Storm Hanna was getting more organized in the Bahamas , according to the hurricane center . At 2 a.m. , Hanna was about 325 miles east-southeast of Nassau in the Bahamas , with winds of 65 mph . Hanna was drenching the Bahamas and Haiti with torrential rains . Haitian officials put the nation 's death toll in the wake of Hanna and Hurricane Gustav at 61 , said Abel Nabaire , the deputy coordinator of the civil protection service . Eight of the country 's 10 departments underwater , he said . More rainfall , up to 15 inches in some places , was possible in the Caribbean , the hurricane center said . Hanna was forecast to return to hurricane strength by Friday as it shot up the east coast of the southern U.S. , with landfall predicted on the South Carolina or North Carolina coast late Friday or early Saturday . `` A hurricane watch may be required for a portion of the southeastern United States coast early Thursday and interests in this area should monitor the progress of Hanna , '' the hurricane center said . Florida could begin seeing rainfall from Hanna on Friday , forecasters said . Watch as Florida also keeps an eye on Hanna » . Swells from Hanna are expected to bolster the number of rip tides along the southeastern U.S. coast this week , the hurricane center said . iReport.com : Hanna makes waves in Bahamas . Hanna passed over the northern Haitian city of Gonaives on Tuesday night , leaving water more than 12 feet deep in some places , an official said . See Hanna 's impact on Haiti » . Many people were still cut off amid floodwater . `` It 's a very grim picture , '' Dr. Jean Pierre Guiteau of the Red Cross said Wednesday . `` We ca n't reach those people ; they are standing on rooftops , waiting for help . '' In line behind Ike in the Atlantic is Tropical Storm Josephine , with top winds near 50 mph , the hurricane center said . Josephine was about 425 miles west of the southernmost Cape Verde Islands off western Africa .
NEW : Hanna goes from 80-mph winds to 135-mph winds in six hours . Hanna to pound U.S. , could regain hurricane strength . Hanna expected to make Bahamas landfall by Saturday or Friday .