2 weather warnings affecting southern Ontario today

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Published July 9, 2024 at 6:49 am

There are two weather warnings affecting southern Ontario today (July 9).

There is a heat warning throughout the Golden Horseshoe, according to Environment Canada and Climate Change, affecting:

  • Mississauga
  • Brampton
  • Toronto
  • Oshawa
  • Pickering
  • Clarington
  • Whitby
  • Oakville
  • Milton
  • Burlington
  • Halton Hills
  • Hamilton
  • and Niagara Region

While the rest of southern Ontario is part of the special weather statement.


The heat event continues today.

Daytime highs are expected to be near 31 C with humidex values of 35 to 38.

Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high risk category.

A cooler airmass is expected to arrive tonight.

The health risks are greater for older adults, infants and young children, pregnant people, people with physical and/or mental illnesses, and people with disabilities or mobility issues.

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

Drink plenty of water regularly, even before you feel thirsty to decrease your risk of dehydration. Thirst is not a good indicator of dehydration.

Never leave people, particularly children, or pets inside a parked vehicle.


Special Weather Statement

Potential for heavy rainfall due to the remnants of Hurricane Beryl today and Thursday.

Torrential downpours give rainfall rates of 20 to 40 mm per hour at times.
Localized rainfall totals possibly well in excess of 50 mm.

This will begin late tonight or Wednesday, and continuing into Thursday.

The heavy rainfall associated with the remnants of Hurricane Beryl may affect portions of southern Ontario beginning tonight or Wednesday and may persist into Thursday.

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