PORTLAND, Ore. – Temperatures in Portland and surrounding areas will climb back to sweltering Sunday, prompting the National Weather Service to issue a heat advisory that lasts until late Sunday evening.
Forecasters expect a high of 93 degrees Fahrenheit in Portland Sunday, with little breeze. Temperatures are expected to cool into the 60-degree range overnight.
Regional responders have been busy over the weekend responding to calls for help on local waterways.
Oregon and Southwest Washington aren't alone under the sweltering heat. At least 20 states are under heat advisories and warnings this weekend.
In the eastern U.S., triple-digit heat and tropical humidity is making Sunday not only deadly but one of the worst days in a summer of record-breaking temperatures. High temperatures and stifling humidity are pushing heat indexes up to 115 degrees in North Carolina, up to 110 degrees in New Jersey and up to 105 degrees in the Ohio valley.
Scores of heat-related deaths have been reported this summer. The latest is a 20-year-old Maryland man who went into cardiac arrest while cycling. His passing marks at least the 17th heat-related death in the state of Maryland, according to Associated Press figures.
Already, the National Oceanic and Atmospheric Administration is referring to June 2010 as the hottest June "ever recorded worldwide." With July continuing the trend, the agency predicts this will be the hottest summer – perhaps even the hottest year.
Meanwhile, in the Pacific Northwest, the heat advisory extends until 9 p.m. Sunday evening. It impacts the greater Portland and Vancouver metropolitan areas along with the western Columbia River Gorge, the Willamette and Hood River valleys, the south Washington Cascade foothills and the north and central Oregon Cascade foothills.