Yellow Rainfall Warning for Dunnville-Caledonia-Haldimand
This alert is no longer in effect.
ECCC issued it on August 3, 2026, 2 weeks ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this ECCC weather alert directly from ECCC's official public data feed. See our methodology for full source attribution and refresh cadence.
Environment Canada has issued a yellow warning for rainfall in effect for the Dunnville-Caledonia-Haldimand area, with localized heavy rainfall and thunderstorms expected to end this evening.
Read this weather record in 30 seconds
- Record type
- Rainfall Warning
- Affected area
- Southwestern Ontario
- Issued
- August 3, 2026
- Issuing authority
- ECCC
The warning type, named area, and issue time define this record. Confirm all three against the original agency notice before treating it as current.
Record status: historical. It was issued 2 weeks ago; use the issuing agency's live warning service for current conditions in Southwestern Ontario.
Alert Details
Yellow warning - rainfall - in effect. Issued by Environment Canada. Effective from 2026-08-03T00:52:41-00:00 and expires 2026-08-03T06:04:41-00:00.
Affected Areas
Dunnville - Caledonia - Haldimand area in southwestern Ontario, including locations impacted by multiple waves of heavy rain and areas closer to Niagara.
What You Should Do
Water will likely pool on roads and in low-lying areas. Some property damage is possible. For information concerning flooding, consult your local Conservation Authority or Ontario Ministry of Natural Resources office. Continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, email ONstorm@ec.gc.ca or post reports on social media using #ONStorm.
Expected Conditions
Total local rainfall amounts of 50 to 80 mm with poor visibility in torrential downpours. Thunderstorms continue.
Timeline
Alert effective 2026-08-03T00:52:41-00:00. Rain will diminish over southwestern Ontario early this evening and later this evening for areas closer to Niagara. Warning ends this evening.
Original source: ECCC Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this ECCC weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,084 characters here).
Similar severity timing
Same severity (medium) notices issued closest in time to August 3, 2026.
Frequently Asked Questions
Common questions about this ECCC weather alert.