Severe Thunderstorm Watch Thursday July 5

On top of the Heat Warning that is still in effect for Today, Environment Canada has issued a Severe Thunderstorm Watch for the Golden Horseshoe and much of Southern Ontario.


From Environment Canada:


Conditions are favourable for the development of dangerous thunderstorms that may be capable of producing torrential rain.

Scattered thunderstorms are expected to develop this afternoon across southern Ontario.

Given the high heat and humidity a few of these thunderstorms could be intense resulting in localized torrential downpours. These thunderstorms are expected to be slow moving, thus some locations could receive on the order of 25 to 50 mm of rain over a short period of time. Localized wind gusts up to 90 km/h will also be a concern.

Fast-moving water across a road can sweep a vehicle away. Strong wind gusts are also possible. Intense lightning is likely with any thunderstorm that develops. Heavy downpours can cause flash floods and water pooling on roads.

The Office of the Fire Marshal and Emergency Management recommends that you take cover immediately if threatening weather approaches.

Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to or tweet reports using #ONStorm.


Something to be on the lookout for this afternoon are the heavy rains and high winds that come with such storms.


The Heat Warning is still in place for this afternoon as well.


The extreme heat event will continue today.

Temperatures are expected to be in the low to mid thirties with Humidex values likely to reach near forty again today.

A cool down is expected by Friday morning with the passage of a cold front.

Never leave people or pets inside a parked vehicle.

Extreme heat affects everyone.

The risks are greater for young children, pregnant women, older adults, people with chronic illnesses and people working or exercising outdoors.

Watch for the effects of heat illness: swelling, rash, cramps, fainting, heat exhaustion, heat stroke and the worsening of some health conditions.

Heat warnings are issued when very high temperature or humidity conditions are expected to pose an elevated risk of heat illnesses, such as heat stroke or heat exhaustion.


Information and Image from Environment Canada.

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