Yellow Heat Warning Issued for Simcoe - Delhi - Norfolk
This alert is no longer in effect.
ECCC issued it on May 18, 2026, 3 months 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 heat in effect for the Simcoe - Delhi - Norfolk area beginning this afternoon.
Read this weather record in 30 seconds
- Record type
- Heat Warning
- Affected area
- Simcoe - Delhi - Norfolk
- Issued
- May 18, 2026
- Issuing authority
- ECCC
Heat notices are time-bound and location-specific. Confirm the current forecast and local public-health guidance before relying on this archived record.
Record status: historical. It was issued 3 months ago; use the issuing agency's live warning service for current conditions in Simcoe - Delhi - Norfolk.
Alert Details
Yellow warning - heat - in effect, issued by Environment Canada. Severity: Moderate. Urgency: Future.
Affected Areas
Simcoe - Delhi - Norfolk
What You Should Do
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
Expected Conditions
Daytime highs near 30 degrees Celsius. Humidex values near 36. Overnight lows of 18 to 20 degrees Celsius.
Timeline
Beginning this afternoon and continuing into Tuesday. Ending Tuesday night. Effective 2026-05-18T08:53:14-00:00. Expires 2026-05-19T00:53:14-00:00.
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 (652 characters here).
Similar severity timing
Same severity (medium) notices issued closest in time to May 18, 2026.
Frequently Asked Questions
Common questions about this ECCC weather alert.