Hurricane Kiko remains a Category 3 system in the central Pacific, forecast to pass north of Hawaii early next week while generating hazardous surf and rip currents from Sunday onward. A statewide State of Emergency was declared on September 5 to prepare for potential impacts.
Northern Sichuan recorded its most intense rainfall of 2025 on September 5, with 12-hour accumulations exceeding 250 mm (10 inches) in Guangyuan and Nanchong, and a provincial maximum of 255.2 mm (10 inches) in Chaotian District. The rainfall triggered flash flooding, street inundations, and emergency responses across multiple districts in Guangyuan and Nanchong.
New activity/unrest was reported for 6 volcanoes from August 27 to September 2, 2025. During the same period, ongoing activity was reported for 23 volcanoes.
Tropical Storm Peipah made landfall in Kochi Prefecture, Japan, around 01:00 JST on Friday, September 5, 2025, bringing strong winds and heavy rainfall across multiple regions. The storm injured at least 24 people and damaged or destroyed several homes. Authorities issued evacuation orders for more than 600 000 residents.
Severe storms swept Through Knoxville, Tennessee on September 4, 2025, damaging dozens of hangars and planes at the Sky Ranch Airport. The storm also knocked out power for over 7 000 customers as it downed trees and power lines across Knox County.
Hurricane Kiko remains a strong category 3 system with maximum sustained winds of 205 km/h (125 mph), moving west at 15 km/h (9 mph). Swells from the storm are expected to reach the Hawaiian Islands late this weekend, producing life-threatening surf and rip currents.
Around 6 to 7 million m3 (212 to 247 million ft3) of magma have accumulated beneath Svartsengi, Iceland since the eruption on July 16, 2025. At the current rate of accumulation, the estimated threshold of 12 million m3 (424 million ft3) could be reached in the latter half of September, increasing the likelihood of a new eruption.
Hurricane Lorena weakened into a tropical storm on September 4, 2025, after bringing heavy rains and flooding to Los Cabos, Mexico. The storm, though no longer expected to make landfall, is still going to bring life-threatening flood conditions to Baja California Sur, Sonora, and parts of the southwestern United States.
Antarctic iceberg A23a, which calved from the Filchner-Ronne Ice Shelf in 1986, is rapidly breaking apart in the South Atlantic as of early September 2025, leaving fragments up to 400 km2 (154 mi2) adrift.
A moderate earthquake registered by the USGS as M5.9 hit the Chile–Argentina border region at 04:10 UTC on September 4, 2025. The agency reported a depth of 176 km (109 miles). EMSC is reporting the same magnitude and depth.
