Question

some times we have see in desert areas that there is water but there is not ? what is that?

Answer 1

it's a mental condition, whee one thrives for water, but doesn't get. the mind looks for water, and sees it, but in imagination,which is so strong that the person feels it reality.

Answer 2

That's Our Imagination

For Example You Are Hungry And Hadnt eat for like 4-5 Days And Then You Will See Everything Food Around Your Surrounding

But In This Case Due to Warmth and Dryness in desert You feel Hot And Your neck is dry and at that point you see Oasis