The NWS Pendleton office issued the watch Tuesday afternoon for much of Central and northeast Oregon, including the Deschutes National Forest, except for the Sisters Ranger District.

The map below identifies areas where the heat index is forecasted to reach NWS-defined levels from "Caution" (80 degrees Fahrenheit) to "Extreme Danger" (above 125 degrees).

PENDLETON — The National Weather Service in Pendleton issued a heat advisory for Tuesday, July 12, in the Tri-Cities and Hermiston areas. NWS is forecasting high temperatures of 103-106 degrees ...

Here's everything you need to know about the heat wave. 'Rare' and 'dangerous': Record-smashing heat wave to scorch tens of millions. National heat index map: See which states feel hottest ...

PENDLETON — The National Weather Service office in Pendleton has issued a heat advisory for Saturday and Sunday, July 15-16, for the Columbia Basin.