Flood Warnings
Current Status
Current Flood Status
See below for previous flood statement:
Watershed Conditions Statement – Flood Outlook
Date: August 2, 2026 Time: 12:30 PM
The Niagara Peninsula Conservation Authority (NPCA) is advising the public and local municipalities of the potential for flooding within its jurisdiction throughout the day of Sunday August 2nd, 2026. This includes the Niagara Peninsula, the southeastern portion of the City of Hamilton, and the eastern portion of Haldimand County.
A low-pressure system is tracking through Southern Ontario today (Sunday). It is expected to bring widespread rainfall across the Niagara Peninsula, with a risk of isolated thunderstorms in some areas. General rainfall amounts of 20 to 30 mm are possible throughout the south, with thunderstorms potentially producing an additional 10 to 25 mm.
Environment Canada models indicate that localized thunderstorms could generate rainfall amounts exceeding 50 mm, in addition to the general rainfall. As a result, total precipitation amounts could exceed 80 mm in some southern areas.
As the system exits through the southeastern corridor tomorrow (Monday), an additional 10 to 15 mm of rainfall is forecast, along with a further 10 to 15 mm from localized thunderstorms. Over the next two-day period (Sunday-Monday), southern Ontario could receive cumulative rainfall totals of 30 to 45 mm from general precipitation, with localized thunderstorms contributing an additional 20 to 40 mm. In areas affected by the heaviest thunderstorms, total rainfall could exceed 80 mm.
While the NPCA does not anticipate major flooding along larger watercourses flash flooding in urbanized and low-lying areas is likely to occur. Overland surface runoff may also occur along smaller watercourses or in flat, poorly drained rural areas – typically within floodplains.
Residents are strongly urged to stay clear of all creeks, rivers, and waterbodies due to slippery banks and elevated water levels, which pose significant hazards. Property owners are encouraged to safely ensure that drainage features—such as culverts, catch basins, and ditches—are free of debris. Secure basement windows or doors which may be reached by flood waters. Municipal and Regional staff are similarly advised to inspect and clear local stormwater infrastructure.
The NPCA will continue to monitor conditions closely and issue updates as required. Current flood status information is available at: Flood Status
Stream Flow Monitoring
This notice remains in effect until 12:00 PM on Monday, August 3rd, 2026, and will be updated as conditions warrant.
For further information contact:
Ryan Kitchen
Flood Risk Management Officer
rkitchen@npca.ca
Work: 905-788-3135 x 269
After hours: 905-658-1838
Chris Polap
Flood Risk Management Technician
Work: 905-788-3135 ext. 260
For media inquiries, contact:
Jennifer McQuillan
Communications & Marketing Specialist
jmcquillan@npca.ca
905-933-0532
Have You Heard About the Alertable App?
Alertable is a trusted emergency alert system used by local, regional, and provincial officials to keep you informed during emergencies like floods, severe weather, and other hazards.
It gives you multiple ways to receive alerts, so you can choose what works best for you.
How Can You Get Alerts?
You can receive alerts through:
- Mobile app (iOS and Android)
- Smart speakers (Amazon Alexa and Google Assistant)
- Public website
- Social media (Facebook and Twitter)
- Coming soon: Facebook Messenger chatbot
What Alerts Do You Get Automatically?
Alertable automatically delivers:
- Severe weather alerts from Environment and Climate Change Canada
- Emergency alerts from Canada’s national system, Alert Ready
- This means important alerts come straight to you without delay.
- Local Flood Alerts
You can now receive Flood Advisories from the Niagara Peninsula Conservation Authority directly on your phone or device—whether you use Android or Apple.
Download Alertable
Desktop:
What To Do If a Flood Message Is Issued
- Read the alert carefully.
- Follow instructions from emergency officials.
- Be prepared to act quickly, including evacuating if required.
Who Monitors Flooding?
Weather and water levels are monitored by:
- Conservation Authorities
- Ontario Ministry of Natural Resources (OMNR)
- Environment and Climate Change Canada
- The OMNR Surface Water Monitoring Centre tracks conditions across Ontario and shares information with Conservation Authorities.
How Flood Warnings Work
Conservation Authorities and OMNR:
- Predict where and when flooding may occur
- Issue flood warnings and advisories
- Activate emergency plans
- Warn residents
- Evacuate areas if necessary
- Municipal emergency officials
- Media outlets
- Public alert platforms like Alertable
What if a Flood Message is Issued for Your Area?
Take heed of the message issued.
Be prepared to follow the advice and instructions of emergency response officials.
Monitoring weather and flood conditions is a shared responsibility of Conservation Authorities, OMNR, and Environment Canada. The OMNR Surface Water Monitoring Centre in Peterborough monitors weather forecasts and water levels across the province, providing the information to Conservation Authorities. Other information is also available from Environment Canada.
Conservation Authorities and the Ontario Ministry of Natural Resources are responsible for forecasting where and when flooding is likely to occur and issuing appropriate messages. Advance warning of an impending flood allows municipalities and other government agencies to put emergency response plans into operation, and if necessary, evacuate communities.
When flooding is possible or about to occur, Conservation Authorities (or the Ministry of Natural Resources in areas where there is no Conservation Authority) issue flood messages to municipal emergency management officials and the media. The municipal officials then take action to warn local residents. Flood messages are posted on Conservation Authorities’ websites. In some watersheds, members of the public can receive flood messages directly through e-mail and/or Twitter.
Messages Key
No flood conditions exist
Be informed and aware.
Water Safety Statements: High flows, unsafe banks, melting ice or other factors that could be dangerous for recreational users such as anglers, canoeists, hikers, children, pets, etc. Flooding is not expected.
Flood Outlook Statements: Early notice of the potential for flooding based on weather forecasts calling for heavy rain, snow melt, high wind or other conditions that could lead to high runoff, cause ice jams, lakeshore flooding or erosion
Flooding is possible in specific watercourses or municipalities. Municipalities, emergency services and individual landowners in flood-prone areas should prepare.
Flooding is imminent or already occurring in specific watercourses or municipalities. Municipalities and individuals should take action to deal with flood conditions. This may include road closures and evacuations.