Haiti ? Hurricane Gustav caused a killer landslide and dumped torrential rains on southern Haiti before weakening to a tropical storm late Tuesday.

Rising water threatened Haiti’s crops amid protests over high food prices, and oil prices rose on fears the storm could batter oil rigs in the Gulf of Mexico.

The storm lingered into the night over Haiti’s poor, deforested southern peninsula, and water levels were rising in banana, bean and vegetable fields. One man was killed in a landslide in the mountain town of Benet, civil protection director Marie Alta Jean-Baptiste told Radio Metropole.

Cars pushed through standing water in the streets of Port-au-Prince, as fallen trees and landslides blocked a major road out of the capital.

Hundreds of people in coastal Les Cayes ignored government warnings to seek shelter, instead throwing rocks to protest the high cost of living in the Western Hemisphere’s poorest country. Witnesses said U.N. peacekeepers used tear gas to disperse the crowd.