Global News shows that the holiday weekend is filled with warning; as a heat wave takes over Western Canada, British Columbians and Albertans are heading into August under more dangerously high temperatures, and little or no rain, as the heat endangers both humans and wildlife. As Jayme Doll reports, the heat is also adding more fuel to an already unprecedented fire season.
A heat wave, or heatwave, is certainly a period of excessively hot weather, which may be accompanied by high humidity, especially in oceanic climate countries. While definitions vary, a heat wave is usually measured relative to the usual weather in the area and relative to normal temperatures for the season. Temperatures that people from a hotter climate consider so-called normal can be called a heat wave in a cooler area if they are outside the normal climate pattern for that area.
The term is applied both to hot weather variations and to extraordinary spells of hot which may occur only once a century. Severe heat waves have caused catastrophic crop failures, thousands of deaths from hyperthermia, and widespread power outages due to increased use of air conditioning. A heat wave is considered extreme weather that can be a severe natural disaster, and a danger because heat and sunlight may overheat the human body. Heat waves can usually be detected using forecasting instruments so that a warning call can be issued.
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