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.

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