Authorities in Madagascar say at least 20 people have died after Tropical Cyclone Gezani hit the large Indian Ocean island. The cyclone made landfall on the east coast late Tuesday and unleashed winds in excess of 195 kilometers per hour. The system has since weakened to a tropical storm. Authorities on Wednesday warned of severe damage and possible floods and landslides as the storm moves across west the island. Gezani hit less than two weeks after Tropical Cyclone Fytia killed at least 14 people in Madagascar. The island is the world's fourth largest and especially vulnerable to tropical cyclones.