Devastation in Mayotte: Cyclone Chido batters France's poorest overseas department Will it be dozens, hundreds or thousands killed? Mayotte's worst cyclone in 90 years has flattened homes, knocked out power and cut phone service, leaving faraway loved ones in limbo as they desperately try to get in touch with those in the French Indian Ocean department. We ask why Chido proved so devastating and track the storm as it now hits Mozambique and the nearby Comoro Islands.