Early Heatwave Sweeps Pacific Northwest, Breaking Records and Prompting Heat Advisory.

An early heatwave is expected to hit the Pacific northwest of the US, with temperatures reaching the high 80s and 90s degrees Fahrenheit, potentially breaking records. The National Weather Service has issued a heat advisory for parts of Oregon and Washington, warning of heat illnesses and advising residents to stay hydrated and in air-conditioned rooms. The heatwave is expected to worsen wildfires in western Canada. The rise in temperature is due to an intense high-pressure system similar to the "heat dome" that caused a record-breaking heatwave two years ago.