Hydration Challenges News Today

Everyone put on sunscreen together. we are doing water breaks. we are doing hydration challenges. so we are doing a lot of preemptive work on that. >> reporter: back here in maricopa county, officials have confirmed at least 12 deaths linked to this heat wave, but perhaps most troubling about all of this, a third of those victims were actually inside at the time and may not have noticed the symptoms until it was too late, norah. >> norah: that is really disturbing. jonathan vigliotti, thank you....