I'm more than a fair weather friend, On me you can depend, To hang around at least 'til summer's end. I serve your house, the store, the school, I'm liked everywhere 'cause I'm so cool.
What friend is this?
Monsoon or rainy season
I shift around, though always slowly. I never move more than a few inches at a time. A large movement by me can kill many people. I am huge, yet unseen by humans. What am I?