Pacific Northwest heat wave could break temperature records through Thursday

A couple watches the sun set, Saturday, May 13, 2023, as seen from the 520 Bridge View Park in Medina, Wash. (AP Photo/Lindsey Wasson)

Numerous heat-related warnings and advisories are being issued for a dangerous heat wave blanketing the Pacific Northwest to the northern Rocky Mountains this week. High and low temperatures could tie or break records.

The National Weather Service (NWS) urged people in parts of Washington, Idaho, Oregon, Montana, and Northern California to prepare for dangerous triple-digit temperatures this week, with little reprieve due to record-warm overnight temperatures until Thursday.

“These temperatures combined with the duration of heat, expected to continue through this week, will increasingly pose a heightened health risk, especially for those without adequate air conditioning,” the NWS short range forecast says. The greatest risk is for residents in western Oregon’s interior valleys and lower elevations, which could see “one of the hottest four day stretches” on record.