I struggle to drink enough water to urinate at all when working on my desert cabin in the summer months. It's completely redefined my perception of how much water the human body can lose to perspiration alone.
I'm not - I've got professional experience managing healthcare in Helmand in the summer. You still don't need as much water as some people think.
I don't know anything about your work or conditions, but my first recommendation would still be to make sure you're eating as much as you need, and then to drink less but more slowly.
I’m not building a roof in any desert during the summer, and am also interested in this drink water more slowly approach.
I was drinking as much as was comfortable to me, since I was worried about getting dehydrated, and still never needed to use the toilet until after the hike was over.
I don’t think drinking less would have helped the situation.
It might have if the unexpected happened and you needed the water to survive the next day. Water consumption when hiking/backpacking can be tricky, especially in hot+arid environments lacking known springs or streams.
edit: Writing this comment has made me realize mixing powdered dehydrated boullion into the water would probably work quite well too. The ambient temps are so high the water is basically at hot soup temperature as-is.
0. Make sure they have Zinc!
I had thought about it mostly for working out and athletes, but perhaps in warmer temps it has more general applicability. I've learned older people often suffer from dehydration without realizing it.
It has a WUT test to test for dehydration and uses your sweat profile to suggest hydration products. There are a lot of options these days beyond Gatorade and Pedialyte.
Most people don't get enough salt, so that's something to watch out for, especially if you are a salty sweater.