Today is the 5-year anniversary of the historic 2021 PNW heat dome, could it happen again? (opens original article in a new tab)

The 2021 Pacific Northwest heat dome caused record temperatures and over 250 deaths, with climate change increasing the risk of similar events.

• The Pacific Northwest experienced a historic heat dome from June 25-28, 2021, with temperatures exceeding all-time records.
• Over 250 people died in the PNW and over 400 in Western Canada during the 2021 heat wave, making extreme heat the leading weather-related hazard.
• Climate change increases the likelihood of heat domes, with similar conditions observed globally in recent years.