Remnants of Hurricane Gabrielle brought extreme rain to eastern Spain on September 19 and 30, 2025, prompting red weather warnings, the suspension of classes for more than 536 000 students, road and rail disruption, and multiple emergency rescues.
One person was confirmed dead in Volusia County, Florida due to rip currents generated by Tropical Storm Imelda, and Hurricane Humberto in the Atlantic. Humberto is forecast to continue producing rip currents across the entire East Coast as Imelda intensifies.
Tropical Storm Imelda formed over the Atlantic on September 28, 2025, as Hurricane Humberto peaked at Category 5, and dropped back to Category 4. While neither of the storms is expected to make landfall over the contiguous United States, they could produce hazardous conditions for the southeastern states including Florida, South Carolina, and much of the East Coast this week.
Tornadoes triggered by Typhoon Bualoi struck Kim Son District in Ninh Binh Province, Vietnam on September 29, 2025, killing at least 9 people and flattening homes. Bualoi made landfall earlier the same day in northern Vietnam, leaving at least 11 people dead, 17 missing, forcing the evacuation of more than 28 500 residents, and damaging nearly 1 400 ha (3 460 acres) of crops.
Severe floods affecting Gila County and parts of central Arizona since September 25, 2025, left at least four people dead and created a major hazmat risk in Globe after around 1 000 propane tanks were washed into the downtown area. Multiple historic buildings in Globe sustained structural damage, prompting officials to declare the city center unsafe.
A series of atmospheric rivers (AR) is forecast to hit the U.S. West Coast from late September through early October, beginning with a strong AR that made landfall over British Columbia on September 26, 2025. Forecasts show moderate AR conditions in Washington, Oregon, and northern California on September 28, followed by a stronger system making landfall on September 30 and potentially continuing into October 7.
At least 10 people have been confirmed dead in Philippines as of September 26 due to Tropical Storm Bualoi (locally named Opong), which made landfall Eastern Samar on September 25 before crossing into Masbate and sweeping through the Bicol region. The storm left behind a trail of destruction, displacing thousands who were already reeling from the destruction left by former Super Typhoon Ragasa.
A rare stratospheric warming event is disrupting the Antarctic polar vortex in September 2025, with forecasts suggesting wetter southern Australia, drier eastern Australia, and a higher chance of abnormally hot days.
The Japan Meteorological Agency (JMA) raised the Alert Level for Meakandake volcano in Hokkaido, Japan, from 1 to 2 at 06:20 UTC (15:20 JST) on September 15, 2025, after an increase in seismicity near Ponmachineshiri Crater. From September 16 to 23, eruptive activity continued with 27–50 daily volcanic earthquakes, minor ashfall, and white steam-and-gas plumes rising 200–800 m (656–2 625 feet) above the crater rim. Access within 500 m (1 640 feet) of the crater remains restricted, affecting parts of Kushiro City and Ashoro Town.
Flash flooding struck Gila county, Arizona, displacing people and causing significant damage in the Globe-Miami area on September 25, 2025.
