On July 6, the British Columbia Coroner Service released preliminary statistics that indicated 610 more sudden deaths than usual occurred in the province. The death toll exceeded 1,400 people, with a death toll of at least 808 estimated in western Canada. The National Oceanic and Atmospheric Administration (NOAA) estimated that the heatwave caused at least $8.9 billion (2021 USD) in damages in the USA. The heat wave also caused extensive damage to crops across the region, which was seen as likely to result in higher food prices globally, though the losses have yet to be calculated. The heat also damaged the road and rail infrastructure, forced closures of businesses, disrupted cultural events, and melted snowcaps, in some cases resulting in flooding.
One of them destroyed the village of Lytton, British Columbia, the day after it had set a record high temperature for Canada. The heat wave sparked numerous extensive wildfires, some reaching hundreds of square kilometers in area, which led to widespread disruption on the roads. However, the Pacific Northwest suffered the vast majority of the disruption and damage connected with the extreme weather event. The record-high temperatures associated with the heat wave stretched from Oregon to northern Manitoba, and daily highs were set as far east as Labrador and as far southwest as Southern California. It resulted in some of the highest temperatures ever recorded in the region, including the highest temperature ever measured in Canada at 49.6 ☌ (121.3 ☏), as well as the highest temperatures in British Columbia, in the Northwest Territories, in the state of Washington as well as a tied record in Oregon. The heat wave appeared due to an exceptionally strong ridge centered over the area, whose strength was linked to the effects of climate change. It also affected inland regions of Central and Southern California, Northwestern and Southern Nevada and parts of Montana, though the temperature anomalies were not as extreme as in the regions farther north.
The heat wave affected Northern California, Idaho, Western Nevada, Oregon, and Washington in the United States, as well as British Columbia, and in its latter phase, Alberta, Manitoba, the Northwest Territories, Saskatchewan, and Yukon, all in Canada. Rapid attribution analysis found this was a 1000-year weather event, made 150 times more likely by climate change. The 2021 Western North America heat wave was an extreme heat wave that affected much of Western North America from late June through mid-July 2021. around 600 excess deaths in the United States.Air temperature anomalies across North America on June 27, 2021, compared to 2014–2020 baselineĤ9.6 ☌ (121.3 ☏), recorded at Lytton, British Columbia
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