The U.N.'s humanitarian chief acknowledged frustration Sunday with the slow progress in providing shelter to the 1.5 million Haitians still homeless because of the Jan. 12 earthquake, and said a large amount of work needs to be done as the hurricane season bears down on the struggling nation.

Behind the once-exclusive gates of this quake-ravaged nation’s only golf course, thousands of sandbags cut a path up and down steep hills, while a new road now doubles as an emergency evacuation route.