Runners ready to run in the scorching Arizona heat might get cooler temperatures instead

What a difference a day makes. On Thursday, the high temperature was 109�F (~42.78�C). On Friday, the forecast high was just 93�F (~33.89�C), representing a 16�F swing in temperatures.�Those cooler temperatures are expected to stick around until Saturday, which is disappointing some runners who were planning to�take�part in an extreme challenge. FOX 10's Steve Krafft reports.