#HTE

Seattle, Washington and Portland, Oregon have both broken all-time temperature records this week amid a “once-in-a-millennium” heat wave across the Pacific Northwest. A “heat dome” like this occurs when the atmosphere traps hot ocean air above land, and this particular event has been exacerbated by higher than usual baseline temperatures due to climate change. The high temperature in Seattle yesterday was 104°F (40°C) and Portland’s high spiked at 114 (44°C).

Source imagery: Nearmap