Yeah, but the tub's upstairs! You know we're close enough into the city and surrounded by enough trees that if a tornado got thru to our house a basement or a bathtub wouldn't help!
No... if you don't have a basement, then the bathtub is a safe place to go... either that or an inner room (which is my bathroom) Or... you can go running into the thing, screaming, "we're all going to die." I find that helpful also.
Also, open just one window.