Environment Canada has issued a severe thunderstorm warning for Vaughan, Richmond Hill, and Markham as a slow-moving system poses a risk of flash flooding.
WEATHER ADVISORY
ENVIRONMENT CANADA
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Issued at 2025-09-23 5:07PM EDT by Environment Canada:
Severe thunderstorm warning – issued for:
Vaughan – Richmond Hill – Markham, Ont. (043240)
Current details:
As of 5:06 p. m. EDT, meteorologists from Environment Canada are monitoring a severe thunderstorm that could produce heavy rainfall.
This storm is located near Maple and is moving southeast at 10 km/h.
Hazard:
Heavy rain with local totals of 50 to 75 mm
Areas affected include:
Richmond Hill, Kleinburg, Maple, King Creek, Laskay and Purpleville.
Intense rain may lead to flash flooding and greatly reduced visibility.
If a thunderstorm approaches, take cover right away. If you’re outside, protect yourself from flying debris and hail. Avoid driving through flooded roads.
Emergency Management Ontario advises that you seek shelter immediately if severe weather is on the way.
Please keep an eye on alerts and forecasts from Environment Canada.
If you see severe weather in Ontario, email [email protected] or share reports on X using #ONStorm.
For more information: https://www. ontario. ca/page/be-prepared-emergency.
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