Canada: High temperatures forecast to persist across eastern regions through at least Aug. 2

High temperatures are forecast to persist across parts of eastern Canada through at least Aug. 2. As of late July 28, Environment Canada has issued red heat warnings (the highest level on a three-tier scale) across the affected area. Maximum temperatures of 28-30 C (82-86 F) and humidex values of 36-38 C (97-100 F), with minimum temperatures of 18 C (64 F) are forecast across eastern New Brunswick through July 29. In Newfoundland and Labrador, maximum temperatures of 28-32 C (82-90 F), with minimum temperatures around 19 C (66 F) are forecast across Upper Lake Melville and the Labrador coast from Postville to Lodge Bay through July 29, across Terra Nova, Bonavista Peninsula, and Clarenville through July 30, and across central and northeastern Newfoundland through July 30 and possibly through Aug. 2. 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 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.

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.