I come in four but also in one hundred and eighteen. When you're not in it, you may feel uneasy. Men have to seek shelter from them.

I sound like a freight train Though you may not see me coming If you do and I’m not moving Hide inside your basement

White river from a gentle beast, flows to nourish the young. Often found in cereal's embrace, or swirling in morning brews.

I am swift. I am fast Even nuclear, I can outlast I'm on the floor, I'm on the wall I can make your skin crawl

Perhaps I'm a fish or part of a shoe, always alone, but not the essence of you. What am I?