06 Jun 2023 | 11:49 PM UTC
Canada: Heatwave forecast to persist across south-central regions through at least June 11 /update 1
Heatwave forecast across parts of south-central Canada through June 11. Health issues likely; transport and power disruptions possible.
Event
High temperatures are forecast across parts of south-central Canada through at least June 11. As of late June 6, Environment Canada has issued red (the highest level on a three-tier scale) heat warnings for parts of southern Alberta, most of Manitoba, far western Ontario, and central and southeastern Saskatchewan. Maximum temperatures of up to 29 C (84 F) are likely in southern Alberta June 6-11, with similar high temperatures forecast to persist in far western Ontario June 6. Humidex values of 38 along with unusually high temperatures will likely continue in the eastern Prairies. The high temperatures in northern and eastern Manitoba and in northern Saskatchewan are forecast to moderate on June 7. Officials could update and possibly extend the coverage of weather alerts over the coming days.
The high temperatures may result in increased energy and water demand and a heightened risk of heat-related illnesses, such as heat exhaustion and heat stroke. Authorities are advising the general public to avoid prolonged exposure to direct sunlight, wear loose and light clothing, and stay hydrated.
Hazardous Conditions
The extended period of oppressive heat and dry conditions may produce ideal circumstances for wildfire growth throughout the region. Heatwaves also pose a threat to vulnerable groups - such as the elderly, children, pregnant women, and those with respiratory illnesses - due to the increased possibility of heat stroke or heat exhaustion during prolonged exposure to high temperatures. These health risks could also extend to relatively healthy individuals during significant heatwave events.
Transport and Utilities
Very high temperatures may warp rail tracks and force passenger and freight trains to operate at reduced speeds. Road surface damage is also possible, and overheated vehicles may worsen traffic problems in urban areas where congestion is already a problem. Commercial trucking disruptions might occur as very high temperatures stress vehicles, making tire blowouts more common. Major flight disruptions are unlikely, but general aviation disruptions are possible, and some airfreight carriers could reduce cargo loads. High temperatures could lead to an increased demand for electricity, which might trigger localized brownouts or blackouts, exacerbating hazardous conditions when air conditioning is no longer possible.
Advice
Monitor local media for weather updates and related advisories. During heat waves, remain indoors in air conditioning when possible. If outdoor activities are necessary, frequently rest in shaded areas; avoid activity during the hottest times of the day. Stay well hydrated by drinking plenty of fluids. Avoid alcoholic beverages, which are dehydrating - drink bottled water or water that has been boiled. Wear loose-fitting, light-colored clothing. Cotton fabrics are more cooling than synthetics. Promptly seek medical attention if signs of heat exhaustion or heat stroke develop. Charge battery-powered devices in the case prolonged electricity outages occur.
