Tropical Storm Oscar formed on Saturday, the 15th named storm of this year’s Atlantic hurricane season and the second in less than a day. It’s expected to bring heavy rain to the Caribbean islands this weekend, including Cuba, which has been facing a nationwide electricity crisis.

Hurricane Oscar made landfall early Sunday in the southeastern Bahamas and was heading toward Cuba, an island recently beleaguered by a massive power outage. The National Hurricane Center in Miami said the storm's center arrived on Great Inagua island.