ENVIRONMENT CANADA
*************************
Heat warning in effect for:
- Guelph - Erin - Southern Wellington County
- Kitchener - Cambridge - Region of Waterloo
- Mount Forest - Arthur - Northern Wellington County
Hot and humid conditions expected to continue today.
Daytime maximum temperatures: 30 to 32 degrees Celsius, with humidex values of 38 to 42.
Nighttime minimum temperatures: 16 to 20 degrees Celsius.
Slightly cooler and less humid air is expected on Friday, however, hot and humid conditions may return this weekend.
Hot and humid air can also bring deteriorating air quality and can cause the Air Quality Health Index to approach the high risk category.
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.
Never leave people or pets inside a parked vehicle.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an [email protected] or tweet reports using #ONStorm.
*************************
Severe thunderstorm watch in effect for:
- Guelph - Erin - Southern Wellington County
- Kitchener - Cambridge - Region of Waterloo
Conditions are favourable for the development of dangerous thunderstorms that may be capable of producing strong wind gusts and torrential rain.
Hazards: Torrential rainfall possibly exceeding 50 mm. Isolated wind gusts to 90 km/h.
Timing: This afternoon and early evening.
Discussion: Isolated thunderstorms are expected to develop this afternoon. The main threat with these thunderstorms will be torrential rainfall that may lead to localized flooding, particularly in more urbanized areas and areas of poor drainage. Rainfall amounts of 50 mm or greater are possible within relatively short periods of time. In addition, some thunderstorms may produce wind gusts to 90 km/h.
Fast-moving water across a road can sweep a vehicle away. Strong wind gusts can toss loose objects, damage weak buildings, break branches off trees and overturn large vehicles. Heavy downpours can cause flash floods and water pooling on roads. Lightning kills and injures Canadians every year. Remember, when thunder roars, go indoors!
Severe thunderstorm watches are issued when atmospheric conditions are favourable for the development of thunderstorms that could produce one or more of the following: large hail, damaging winds, torrential rainfall.
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 or tweet reports using #ONStorm.
*************************
