That same day, Tropical Storm Gaston formed over the Central Atlantic. Fiona would strengthen into a category 4 hurricane as it passed west of Bermuda while Gaston would strike the Azores. As Fiona transitioned into a powerful extratropical cyclone that would strike Nova Scotia on September 23, Tropical Storm Hermine and Tropical Depression Nine formed in the Eastern Atlantic and the Caribbean Sea respectively, marking the first time since 2020 that four tropical cyclones were active simultaneously in the Atlantic basin.[36] Tropical Depression Nine would rapidly strengthen into Hurricane Ian as the three other storms dissipated, and make landfall on Cuba as a high-end Category 3 hurricane.