the storm first developed on august 17, 2017, from a tropical wave to the east of the lesser antilles. it faded into an open tropical wave on august 19. but on august 24, harvey redeveloped into a tropical storm, and then strengthened into a hurricane. on august 25, harvey rapidly strengthened into a category 4 hurricane with maximum sustained winds of at least 130 mph, and it made landfall in texas as a low-end category 4 hurricane. on august 26, harvey stalled and rapidly weakened into a tropical storm in just a few hours after making landfall, resulting of dumping heavy rainfall and caused major and catastrophic flooding in parts of southeastern texas especially the houston metropolitan area.