A severe hailstorm struck southeastern Alberta, Canada, on August 20, 2025, producing wind gusts up to 150 km/h (93 mph), large hail, and widespread damage to crops, livestock, and infrastructure.
Toronto, Ontario recorded one of its hottest summers on record in 2025, with six heatwaves, 14 days above 32°C (90°F), and 24 nights above 20°C (68°F) as of August 24, according to Environment Canada.
An atmospheric river (AR) with moderate-to-strong integrated vapor transport (IVT) exceeding 500 kg m⁻¹ s⁻¹ is forecast to make landfall over the Pacific Northwest and southern British Columbia on the evening of August 14, 2025, bringing sustained AR conditions for about 24 hours and significant precipitation through August 16.
The first significant rainfall event in weeks is forecast for coastal British Columbia, Canada, with an atmospheric river expected to bring 20–40 mm (0.8–1.6 inches) to the Lower Mainland and over 50 mm (2 inches) to higher elevations from August 15 to 17, 2025. The rainfall is expected to bring some relief to the region following prolonged wildfire activity that has scorched over 7 000 000 ha (1.8 million acres) across Canada making it the country’s second-worst wildfire season on record.
Severe thunderstorms impacted eastern Ontario and southern Quebec, Canada on July 13, 2025, producing up to 100 mm (3.9 inches) of rain in 90 minutes, flash floods, wind gusts up to 90 km/h (56 mph), and widespread power outages affecting more than 60 000 customers.
A powerful ice storm swept across northern U.S. and eastern Canada over the weekend, leaving more than 450 000 customers without power and causing significant ice accretion from Michigan to Ottawa.
A clipper system moving through Ontario on February 28, 2025, is expected to bring heavy snowfall, with accumulations of up to 15 cm (5.9 inches) in some regions. The system will primarily affect northern and eastern Ontario, including Ottawa, where snowfall will impact the evening commute.
A powerful winter storm swept through southern Ontario, Canada on Wednesday, February 12, 2025, bringing over 20 cm (7.9 inches) of snow to some areas and creating hazardous travel conditions across the region. Schools along with other institutions have been closed off for Thursday, February 13 due to the storm with stronger winds in the forecast and dangerous travel conditions being likely to continue.
A major traffic accident shut down Highway 11 through Orillia, Ontario, Canada on February 7, 2025, as whiteout conditions reduced visibility to near zero, resulting in one fatality.
A powerful, rapidly intensifying cyclone wreaked havoc across the northwestern United States and parts of Canada on Wednesday, November 20, 2024, causing at least 2 deaths and leaving more than 600 000 customers (approximately 1.5 million people) in the U.S. without power. Another 140 000 customers (approximately 335 000 people) were left without power in B.C., Canada.
