The climate where I live isn't as hot as a desert, but with the humidity, the heat index can bring conditions as brutal as any desert. Working outside brings sweat immediately, and it doesn't dry. Clothes are soaked within minutes, and regardless of how much water you drink, it doesn't replace the electrolytes. Your stomach is bloated with water, and severe heat cramps are soon to arrive.
I've tried many different things, but a supplement called Medi Lyte is a big help, and nothing helps better than slugging a few gulps of juice from a bottle of pickles. Products like Gatorade help, but I found too much will not do the job, and have seen people vomit after drinking too much.
When I worked, we would fill two large water jugs each day. One was plain water, and the other had half the powdered Gatorade that was considered the right amount. I kept supplements on hand, and watched the crew closely. Over the years, I had a few I had to place in an air-conditioned truck to cool down, and had one I had to call for an ambulance. His reaction to the heat led to hyperventilation, which aggravated his heat exhaustion. I had one employee that had to be driven home because his heat cramps prevented him from driving.
I had days where I know I drank well over a gallon liquid during a day at work. On one project, I literally poured sweat from my work boots in the evening. The 16 hour days, brutal heat, and lack of sleep whittled 20 pounds off me in a month. If I had to do it again, I wouldn't.
So, stay hydrated, avoid exposure to the heat, and keep a bottle of pickles handy...just in case.

