The Deadly Season The historic 2017 Atlantic hurricane season produced 17 named storms, most notably Harvey, Irma, and Maria that left hundreds dead, destroyed communities across the southern U.S. and Caribbean and caused an estimated $265 billion in damage – the most expensive hurricane season on record. Hurricane Harvey set a new mark for the most rainfall from a U.S. tropical storm. Hurricane Irma became one of the strongest Atlantic Ocean hurricanes ever recorded. Hurricane Maria was the most powerful hurricane to make landfall on the main island of Puerto Rico in 85 years.