Hurricane Erin is one of the fastest rapidly intensifying storms in Atlantic history

Hurricane Erin, which is the first hurricane of the 2025 Atlantic season and has developed into a dangerous Category 4 hurricane, moves westward near Puerto Rico in a composite satellite image on Saturday. Cira/NOAA/Reuters

Leah Khan
Aug 17, 2025
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4 min read
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, churning through the Atlantic Ocean north of the Caribbean. Erin went from a Category 1 hurricane with 75 mph winds at 11 a.m. Friday to a Category 5 with near 160 mph winds just over 24 hours later. It put Erin in the history books as one of the fastest-strengthening Atlantic hurricanes on record, and potentially the fastest intensification rate for any storm earlier than September 1. Erin is still “a formidable Category 4 hurricane”, the National Hurricane Center said before Saturday midnight, and is forecast to return to Category 5 strength as it undergoes an eyewall replacement cycle, a process that will cause the storm’s windfield to grow in size. Rapid intensification is when a hurricane gains at least 35 mph of wind speed in at least 24 hours. Extreme rapid intensification historically tends to happen in September and October. Even more hurricanes are rapidly intensifying in the Atlantic as the oceans and atmosphere warm in response to fossil fuel pollution and the global warming it causes. This likely makes Erin another example of the increasing extremes of a warming world. Furthermore, Hurricane Erin is now one of only 43 Category 5 hurricanes on record in the Atlantic – which makes it rare, though not as rare in the context of recent hurricane seasons – as peak strength is becoming easier for storms to achieve. It is the 11th Category 5 hurricane recorded in the Atlantic since 2016, an unusually high number. It’s also unusual to see a Category 5 storm form so early in the season, particularly outside of the Gulf of Mexico. Mid-August is around the time of peak hurricane activity, but the strongest storms tend to occur later in the season. The 2025 Atlantic hurricane season is now the fourth straight season to feature a Category 5 storm, with two occurring last year, hurricanes Beryl and Milton. Hurricane Erin is still expected to avoid a direct hit on any land mass, passing north of Puerto Rico, then curving north-northeast into the open Atlantic between the East Coast and Bermuda next week. As it does so, it is expected to double or even triple in size. Erin is about 150 miles northeast of San Juan, Puerto Rico and about 160 miles northwest of Anguilla as of Saturday evening. A flash flood warning has been issued for northern Puerto Rico until midnight Saturday and tropical storm watches remain in effect for the Turks and Caicos Islands and parts of the Leeward Islands. The outer bands of the storm will continue to produce areas of heavy rainfall through Sunday across the northern Leeward Islands, the Virgin Islands, and Puerto Rico, the Hurricane Center said. Considerable flash flooding, landslides and mudslides, are possible, it added. The storm is expected to produce life-threatening surf and rip currents along the beaches of the Bahamas, much of the US East Coast, and Atlantic Canada next week, according to the National Hurricane Center.

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Ruth Aluoch
5 months, 3 weeks ago (edited)
Tragic
R
Ruth Aluoch
5 months, 3 weeks ago (edited)
Tragic