Tropical Storm Isaac, which swept across Cuba at the weekend before heading toward the southern United States, substantially boosted the communist nation's water reserves, state media said Monday.

The rains from Isaac added 74.4 million cubic meters of water to the five reservoirs closest to the storm's path, according to the official daily Granma.

Before the tropical storm hit the island, 11 reservoirs in Santiago de Cuba province were at 57 percent capacity but have now increased to 66 percent said the island's Institute of Water Reserves.

Dams in the central province of Ciego de Avila, meanwhile, are at 96 percent capacity, a local official said.

Civil defense officials said Sunday that Isaac did not kill anyone in Cuba, unlike in Haiti and the Dominican Republic, which recorded 19 and two deaths respectively, though it did damage to housing, crops and the electricity grid.