ANTANANARIVO, Madagascar—Cyclone Emnati crashed into the southeastern coast of Madagascar in the early hours of Wednesday, ripping roofs off houses and raising fears of flooding and food shortages in a region still recovering from the destruction inflicted by another tropical storm just weeks ago. More than 30,000 people were moved to safe accommodation before Emnati arrived and Madagascar’s National Office for Risk and Disaster Management estimates more than 250,000 people could be impacted by the latest cyclone. There were no immediate reports of deaths or injuries from Emnati as authorities waited for the worst to pass, but local officials and witnesses reported extensive damage to houses and other buildings in at least one southeastern city. Madagascar, an island off the east coast of Africa renowned for its wildlife and unspoiled natural treasures, has now been hit by four major tropical storms in the last month, killing nearly 200 people already …