I just read about an Indiana woman who died after drinking 4 16oz. bottles of water within 20 minutes. The sudden intake of water threw her electrolyte balance off and caused her brain to swell. Be careful out there. Even if you've been in the sun all day, don't consume large amounts of water in a short amount of time.
@Avidspark I sweat in the same fashion. Given the opportunity to get rid of body heat, my body cranks the sweat response up to 11. Even when I was in peak physical shape in my 20s I sweated a ton. I never tried to drink a gallon in minutes but I did have to work at staying hydrated in the heat.
@divisionbyzero Brother! Yah, I do too, and the only reason I was so parched was that we hadn't been able to take even a breather that entire morning...when the concrete arrives, you pour until it's gone!