Severe weather hits Niagara from every direction. We log the storms that damage roofs so homeowners, reporters, and insurers have one sourced record to point to.
A running log of severe weather events that affect roofs across the Niagara Region. Each entry lists the date, the type of storm, the municipalities in the path, measured wind, hail, or snow where reported, and a link to the source. Some entries are Environment Canada warnings that list the forecast hazard rather than a confirmed damage total.
Affected areas Niagara Falls, Welland, Southern Niagara Region
Conditions are favourable for the development of severe thunderstorms that may be capable of producing strong wind gusts, large hail and heavy rain. Hazards: Strong wind gusts. (Text from the Environment Canada alert.)
Source: Environment and Climate Change Canada, public weather alertsAffected areas St. Catharines, Lincoln, Niagara Region (general)
The Niagara Peninsula Conservation Authority issued a flood outlook on Friday, August 21 for the whole peninsula ahead of a wet weekend, warning of flash flooding along small and urban watercourses and localized flooding in low-lying or poorly drained areas, while noting major flooding on larger rivers was not expected. Environment Canada's statement called for upwards of 50 mm of rain. After the weekend, the NPCA said it was watching water levels closely, and no flooding, outage, or damage reports were published. Coming a month after the July floods, this is exactly the kind of repeat soaking that turns an already-overwhelmed eavestrough or a lifted flashing into an interior leak, so it belongs on the record even without a damage total.
Source: Niagara Peninsula Conservation Authority, flood statusAffected areas Niagara Region (general)
Environment Canada issued a special weather statement as a line of heavy showers and thunderstorms tracked east over the Niagara region during the morning, with around 50 mm of rain forecast. The rain arrived while thousands of residents were still cleaning up from the late-July and August 2 flooding. No damage or outage reports were published for this event.
Source: CBC HamiltonAffected areas Niagara Falls, Welland, Southern Niagara Region
Conditions are no longer favourable for the development of severe thunderstorms. (Text from the Environment Canada alert.)
Source: Environment and Climate Change Canada, public weather alertsAffected areas St. Catharines, Niagara Falls, Niagara Region (general)
Environment Canada issued a tornado warning for St. Catharines and Niagara Falls after meteorologists detected a severe thunderstorm possibly producing a tornado near Niagara Falls. The warning was later lifted, but the storm carried damaging wind gusts, large hail, and torrential rainfall risk, with localized totals over 50 mm — landing less than a week after the region was already saturated by the late-July flooding.
Source: CP24Affected areas St. Catharines, Niagara Region (general)
Three storms between July 21 and July 28 dumped almost 400 mm of rain on St. Catharines, prompting the city to declare a state of emergency. Mayor Mat Siscoe reported flooding damaged thousands of homes, with entire neighbourhoods clearing out destroyed contents. The Insurance Bureau of Canada activated its Virtual Community Assistance Mobile Pavilion helpline, and some properties were damaged more than once within the same week. Rain volumes like this overwhelm eavestroughs and downspouts long before the foundation is the problem, and saturated ground plus repeat storms means even small roofline weaknesses turned into interior water damage.
Source: Canadian UnderwriterAffected areas St. Catharines, Niagara-on-the-Lake, Beamsville, Lincoln
Overnight rain of 20 to 35 mm in about six hours flooded basements in north St. Catharines and Niagara-on-the-Lake, with one resident reporting two feet of water. More than 200 customers lost power overnight, with outages in Beamsville and Lincoln still being restored Tuesday morning. The St. Catharines A weather station measured a 68 km/h gust on July 27 as the system moved in. Rain at this intensity finds every weak point in flashing, valleys, and eavestroughs, and basement flooding often starts with overwhelmed downspouts and grading rather than the foundation itself.
Source: CHCH NewsAffected areas Niagara Falls, Welland, Southern Niagara Region
Conditions are favourable for the development of severe thunderstorms that may be capable of producing strong wind gusts, large hail and heavy rain. Hazards: Torrential downpours. (Text from the Environment Canada alert.)
Source: Environment and Climate Change Canada, public weather alertsAffected areas Thorold
An early-morning storm brought sheets of rain, hail, extreme lightning, and high winds that uprooted large trees, downed power lines, and closed roads east of Ormond Street. At its peak the outage left more than 2,500 homes without power. Hydro One, Thorold Fire and Emergency Services, and Public Works worked through the weekend to clear trees and restore electricity.
Source: City of ThoroldAffected areas St. Catharines, Niagara Region (general)
Environment and Climate Change Canada's St. Catharines A weather station recorded a 95 km/h peak gust on Canada Day, the strongest wind measured in Niagara so far this year. Gusts in this range are strong enough to lift or crease shingles, especially along ridges, rakes, and eaves where wind pressure concentrates.
Source: Environment and Climate Change Canada, daily climate data (St. Catharines A)Affected areas Niagara Falls, Welland, Southern Niagara Region
Environment Canada meteorologists tracked a severe thunderstorm capable of producing damaging wind gusts and heavy rain across Niagara Falls, Welland, and the southern Niagara Region. Damage to roofs, fences, soft shelters, and trees was likely, along with local utility outages. The St. Catharines A weather station measured a 76 km/h peak gust that day.
Source: ThoroldTodayAffected areas Beamsville, Vineland, St. Catharines, Welland, Thorold, Port Colborne, Niagara Falls, Fort Erie
Environment Canada tracked a severe thunderstorm capable of damaging wind gusts and quarter-size hail. Local power outages were likely, along with damage to roofs, fences, soft shelters, and trees.
Source: Niagara-on-the-Lake LocalAffected areas Fort Erie, Port Colborne, St. Catharines, Niagara Region (general)
Winds up to 110 km/h knocked out power to more than a thousand homes, hardest in Fort Erie and Port Colborne. Outages began around 7 a.m. as trees fell on lines, and most power was restored by the next evening.
Source: CBC NewsAffected areas Fort Erie, Welland, Fonthill, Crystal Beach, Stevensville
Environment Canada tracked a severe thunderstorm that was briefly capable of producing a tornado, with damaging winds, large hail, and heavy rain across southern Niagara. The tornado warning was later ended as the threat passed.
Source: ThoroldTodayAct fast. Water that gets past damaged shingles can spread into the deck, attic, and ceilings within days. Take photos before any cleanup, then call for an emergency tarp and inspection. We can also walk you through the insurance claim process.
Niagara-specific event logging on this page begins in 2024. For longer-term context, insured damage from severe weather across Canada has climbed sharply, which is the trend driving higher claims and premiums in the region.
Source: Insurance Bureau of Canada
Journalists, bloggers, and researchers are welcome to cite this page. Copy a ready-made citation below, or reach out for comment and the source data behind any figure.
Niagara Peak Roofing. (2026). Niagara Region Storm and Weather Damage Tracker 2026. Retrieved September 2, 2026, from https://niagarapeakroofing.ca/niagara-storm-damage-tracker/
"Niagara Region Storm and Weather Damage Tracker 2026." Niagara Peak Roofing, 2 September 2026, https://niagarapeakroofing.ca/niagara-storm-damage-tracker/.
Niagara Region Storm and Weather Damage Tracker 2026. Niagara Peak Roofing. https://niagarapeakroofing.ca/niagara-storm-damage-tracker/
Media and press inquiries: [email protected]