A massive dust storm swept across the Ica Valley, southern Peru, on July 31, 2025, with experts describing it as unprecedented in the region. The phenomenon reduced visibility to near zero, disrupted transport, and was driven by an unusual convergence of high‑ and low‑pressure systems.
Up to 50 cm (20 inches) of snow fell across elevated areas of New South Wales’ Northern Tablelands on Saturday, August 2, 2025, as a rare winter storm disrupted transport and triggered widespread emergency response. Around 200 vehicles were stranded due to the severe weather, with the State Emergency Services responding to 745 weather related incidents in just 24 hours.
Tropical Storm Gil strengthened into a hurricane over the eastern Pacific Ocean at 03:00 UTC on August 2, 2025 (17:00 HST on August 1), according to the National Hurricane Center. It is now the fourth hurricane of the 20205 eastern Pacific hurricane season.
Flash floods struck parts of the northeastern United States on July 31, 2025, killing one person in Maryland and prompting state emergencies in New York and New Jersey.
Heavy to excessive rainfall and severe thunderstorms are expected across parts of the Mid-Atlantic and the Northeast on July 31, 2025, as a slow-moving cold front interacts with favorable upper jet dynamics and anomalous moisture.
Typhoon Co-may made a double landfall in China’s Zhejiang and Shanghai on July 30, 2025, bringing record rainfall and severe flooding that forced over 282 000 to relocate.
An extratropical cyclone impacted Rio Grande do Sul, Brazil, between July 28 and 29, 2025, producing wind gusts over 100 km/h (62 mph) and waves reaching 3.5 m (11 feet), causing widespread structural damage, coastal flooding, and large-scale power outages.
A destructive derecho swept through the central United States from the evening of July 28 into early July 29 2025, producing wind gusts up to 160 km/h (99 mph), toppling trees, and causing widespread power outages.
At least 30 people died and more than 80 000 were evacuated in Beijing, China, after record rainfall from July 26–28, 2025, caused severe flooding and landslides.
Hurricane Iona and Tropical Storm Keli formed southeast of Hawaii on July 28, 2025, becoming the first two named cyclones of the 2025 central Pacific hurricane season. Iona was named in the NHC advisory issued at 03:00 UTC and reached hurricane strength by 15:00 UTC the same day. Keli followed approximately 18 hours later, reaching tropical storm strength by 21:00 UTC. Both systems are moving westward and are not expected to make landfall.
