High heat warnings extended in Pacific Northwest

The scorching heat spell in the Pacific Northwest is now expected to last longer than forecaster had initially predicted.

The National Weather Service extended the excessive heat warning for the city from Thursday through Saturday evening.Temperatures hit a daily record of 38.9 Celsius in Portland, Oregon on Tuesday.Climate change is fueling longer heat waves in the Pacific Northwest, a region where weeklong heat spells were historically rare, according to climate experts.