 It's 1 o'clock, another hour of Science Friday coming up next. This is 88.9 FM, KAWC Yuma, KAWP Parker, kawc.org, and now on the KAWC app, a service of Arizona Western College for more than 50 years, trusted news for Yuma and La Paz counties. An excessive heat warning in effect for both Yuma and Parker through Saturday. Sunny and hot today for Yuma, 113 the high. South winds at 5 to 10 miles per hour, mostly clear.