6/26/08

The big thermostat in the sky is forecast to be cranked up high this weekend — and spectators and athletes at the U.S. Olympic Track & Field Trials will be sweating the details of how to handle the unusual heat.

On Friday, the opening day of activities, the mercury could reach 91 degrees, while temperatures could climb to 95 on Saturday and 94 on Sunday, according to the National Weather Service in Portland. AccuWeather.com, meanwhile, predicts highs during those three days of between 85 and 90 degrees. Either way, the temperatures easily will exceed the highs in the upper 70stypically seen this time of year.