Ordinarily, the term "buckle up" has positive safety connotations for most people. But it has taken on quite the opposite meaning in recent days, as sweltering temperatures are cooking everything and everybody in sight - and making sections of highway pop up.

The temperature soared to 99 Thursday in the Salt Lake area, and on Friday the thermometer will likely hit 100, according to William J. Alder of the National Weather Service's Salt Lake office.Several Utah locations are notching 100-plus temperatures, including highs of 108 in St. George and Bullfrog on Lake Powell.

Unseasonably hot temperatures continue to take their toll on I-15 in northern Utah, where several sections of freeway have buckled.

The interstate "blowups" have occurred this week near Riverdale Road, on northbound I-15 near Willard Bay, on southbound I-15 near Sunset, Davis County, and on northbound I-15 near Clearfield. Emergency repairs have been made on all known freeway problems, said John Gunderson, Utah Department of Transportation maintenance engineer.