( CNN ) -- After dealing a walloping blow to Haiti , where at least six people died and a number of homes were destroyed , Tropical Storm Tomas weakened rapidly Sunday , the National Hurricane Center said . As of 4 p.m . ET , Tomas was located about 500 miles ( 805 kilometers ) south-southwest of Bermuda , forecasters said . It was downgraded to a tropical storm early Sunday . Its maximum sustained winds were at 60 mph ( 95 kph ) , but Tomas was not posing a threat to land . The storm was heading north-northeast at near 3 mph ( 6 kph ) . It was forecast to turn northeast or east-northeast and accelerate in the next couple of days , the Hurricane Center said in its last advisory on Tomas . Further weakening is expected , forecasters said . In Haiti , a nation still grappling with the effects of a killer earthquake and a deadly cholera outbreak this year , Tomas ruined houses and turned some streets into rivers . Six people were also killed by the storm , according to the Haitian Civil Protection Authority . January 's 7.0-magnitude earthquake killed 250,000 people and left 1 million more homeless . Many of those Haitians have been living in tent camps , and aid workers had been working in recent days to move the residents to safer housing , which was difficult to find . Aid workers were already struggling to keep up with the cholera outbreak , which has killed 501 people since the first cases were reported in October . An additional 7,000 are hospitalized . The bacterial disease causes diarrhea and vomiting that can lead to deadly dehydration within hours . In Leogane , west of Haiti 's capital of Port-au-Prince , residents waded in knee-deep water after Tomas . Box trucks got stuck in water , said relief worker Roseann Dennery of Samaritan 's Purse . While the flooding receded somewhat over the weekend , the threat of waterborne disease remained a concern . `` Samaritan 's Purse is moving quickly to set up cholera treatment centers in areas where there currently are n't any , and where new cases are appearing as the bacteria continues to spread , '' Dennery said . Mudslides also remain a risk because many of the nation 's mountains have been stripped of vegetation , which means rain can flow downhill relatively unimpeded , said CNN meteorologist Reynolds Wolf . `` We could see mudslides a week after the storm has passed , '' Wolf said . Tomas has also dumped more than 10 inches of rain in the Dominican Republic . Earlier , it caused extensive damage and killed 12 people on St. Lucia and also caused damage on St. Vincent . CNN 's Paula Newton contributed to this report .
NEW : Storm is expected to weaken further . Tomas killed 6 on Haiti and flooded some areas . Earlier , Tomas killed 12 on St. Lucia .