Powerful Hurricane Erin has undergone a period of astonishingly rapid intensification — a phenomenon that has become far more common in recent years as the planet warms. It was a rare Category 5 for a time Saturday before becoming a Category 4,

Years later, in 2022, Hurricane Fiona also made landfall in Puerto Rico, bringing “catastrophic and life-threatening flooding” as the slow-moving Category 1 storm dumped trillions of gallons of water on the island.