What is the cause of (and what can I do about) the dryness in my throat?

So I’m here in Colorado, it’s summertime, its 100 degrees during the day and not much better feeling at night. Despite drinking so much water I can’t stand it, I have this constant nagging dryness that I think anyone who has ever lived in an arid climate is familiar with. It is unquenchable with water and can sometimes turn into a tickle/cough. It is one specific place in the back of my throat and it’s so subtle yet so frustrating and terrible, because if I’m in a situation (work) where I can’t get a drink for an hour or so, it can turn into almost choking when I try to talk! Ugh, help. It’s only the beginning! Is my only option lozenges, and sleeping with the humidifier on? Maybe you have some tips?