Hey Ken, ok Mexico, probably hotter than here!
Anyway, referring to your excessive thirst and water intake - I know there's a thread about this elsewhere but I can't find it now - i'm having a brain foggy day today
Talking about drinking too much water - if water isn't quenching the thirst it can mean your electrolytes are out of balance.
You can make a home remedy, the 'sports drinks' are full of crap
I found this recipe somewhere - The most important thing is to use a good quality Sea Salt or Rock Salt, as it has natural salts in it, DON'T USE TABLE SALT because it is refined (like the difference between refined white sugar and raw sugar); e.g.Pink Himalayan Salt is good; also citrus juice is for the taste and vitamin C - you can use less or change it - e.g. make up some peppermint tea and let it cool and dilute it with this mix. I personally use much less juice and only 1 spoonful of honey and dilute it more. Apparently Coconut Water is a good natural electrolyte drink, so maybe include some of that in your daily 'water' intake.
Homemade Electrolyte Drink
4 cups filtered water
1/4 cup fresh squeezed lemon juice
1/4 cup fresh squeezed lime juice
1/4 cup raw honey or maple syrup (adjust for taste)
1/4 tsp. sea salt or rock salt (not refined table salt!)
Happy Drinking - Here's to trying to quench the relentless thirst