No warnings were issued because the storm Friday afternoon was not predicted.

Five deaths have been confirmed so far and the United Nations received reports of others who were injured or trapped.

At Port-au-Prince's Petionville Golf Club, where actor Sean Penn's aid organization JP HRO has been managing a camp for almost 50,000 quake-displaced Haitians, the medical tent was ripped apart as was a tent that housed the group's staff.

Photos showed nothing but sky over what used to serve as the nerve center for JP HRO. No deaths were reported at that camp despite the destruction of some tents and the hillsides turning into treacherous mud.

Elsewhere in Port-au-Prince, the sudden storm uprooted giant trees and took down billboards, lampposts and structures that had withstood the killer January quake. More than 200,000 people died and 1.6 million people were left homeless.