I've been there before. I was in the hospital after long hot days for low potassium two times in the past. I've since learned to take care of my self better. When its hot, I drink cold poweraid and I can feel when my body needs me to eat property. I also make sure I eat at least a potato worth of potassium supplying foods each day. For me, eating a bananna at the end of the day is very common. You have to put back what you lose in sweat and you should pee 2 times during your work day.