Last updated July 19, 2022
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Northwest Pacific Heat Wave June 2021

United States

The most severe heat wave in the history of the Pacific Northwest and Canada gripped the region in all-time record-breaking triple-digit heat at the end of June. The heat wave was due to a major heat dome, or sprawling zone of high pressure, and bulging jet stream that sent hot air flowing into the region for several days. Both the record temperatures and record-strong high pressure system have strong ties to human-caused climate change.

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heat wave
Greenhouse Gas Emissions
Global Warming
Large Scale Global Circulation Change
Atmospheric Blocking Increase
Air Mass Temperature Increase
Extreme Heat and Heat Waves
Northwest Pacific Heat Wave June 2021

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