Do you know about Ramzan? [Spirituality & Religion]

It's a month of fast concluded by the festival of Eid. Muslims fast for the entire month, that is, they can't eat anything between 3:30 am to 7:00 pm for a month. They can't even have water and this is what baffles me. In my city which is among the most humid in the word and temperature hits 40 C more often than not, I don't know how they do this. Living a couple hours without water is literally impossible for me 😐