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.
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.
Tropical Storm Humberto is forecast to strengthen into a major hurricane by the weekend, while tropical disturbance AL94 shows high chance of cyclonic development within 2 days from September 26, 2025.
A strong atmospheric river is forecast to shift southward along the British Columbia coast between September 26 and 29, 2025, bringing several low-pressure systems and periods of heavy rainfall to Vancouver Island and the South Coast. Forecasts suggest up to 100 mm (4 inches) of rain in west-facing coastal mountains, with persistent showers likely across the Lower Mainland.
At least 14 people were killed and 46 remain missing after the Maitai’an Creek barrier lake overflowed in Hualien County, Taiwan, on September 23, 2025. The flood, triggered by extreme rainfall from former Typhoon Ragasa, released about 60 million tonnes of water downstream, inundating Guangfu Township and nearby areas.
Heavy to excessive rainfall from monsoon thunderstorms may bring isolated flash and urban flooding to the Desert Southwest into Sunday, September 28, 2025. A plume of anomalously high monsoonal moisture streaming northward on the eastern flank of a slow-moving upper-level low will fuel several rounds of widespread showers and thunderstorms, with greatest impacts expected across southeastern Arizona and southwestern New Mexico.
