Canada: High temperatures forecast to continue across parts of southern Alberta and southern Saskatchewan through at least early Aug. 3 /update 12

High temperatures are forecast across parts of southern Alberta and southern Saskatchewan through at least early Aug. 3. As of late July 31, Environment Canada has issued red heat warnings (the highest level on a three-tier scale) across the affected area. Daytime high temperatures of 29-33 C (84-91 F) are expected over the coming days, and overnight lows of 14-18 C (57-64 F) will not bring much relief from the heat. The high temperatures are forecast to ease early Aug. 3. Officials could update and 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 advise the general public to avoid prolonged exposure to direct sunlight, wear loose and light clothing, and stay hydrated.

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.

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 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.