Western Washington heat wave: Advisory issued for temps 15-20 degrees above average The National Weather Service issued a heat advisory for much of the region through Wednesday night.Share this: Heat advisory issued as summer arrives in western WashingtonDateJune 20, 2026In relation toKing 5 NewsHeat advisory issued as another stretch of 80s, 90s heads to western WADateJuly 19, 2026In relation toKing 5 NewsWinter Weather Advisory issued for Cascade MountainsDateOctober 26, 2026In relation toKing 5 News