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A late-season heat wave is expected to bring temperatures 15 to 20 degrees above normal to the Pacific Northwest.

The National Weather Service warns of a major risk for heat-related illness due to the extreme heat.

Overnight temperatures will remain unusually high, with many areas not dipping below the low 60s.

The Climate Prediction Center forecasts above-normal temperatures to continue across Washington through September.

A “dangerous” late-season heat wave is expected to return to Washington — not because temperatures will soar to record-breaking extremes, but because they will run far hotter than what the region is used to this time of year.

Across the Pacific Northwest, temperatures are forecast to climb 15 to 20 degrees above normal with temperatures peaki

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