Because a tornado warning or emergency means that a tornado has been spotted, you have got to act ASAP. To make sure you're prepared, AccuWeather suggests that you should have an emergency kit with things like non-perishable food, water, a flashlight, a battery-powered radio, and a first-aid kit. Also, remember to have spare batteries for both the flashlight and radio.

With this kit, you should head to a storm shelter, basement, or even a closet. If neither of those are an option, try and place yourself in the middle of any building you're in away from windows. If possible, go to an area with reinforced walls.

With the radio, keep yourself and others informed with official announcements about the status of the tornado.

While you're waiting for the storm to pass and can see outside, look for "dark greenish clouds" and large hailstones. You may also hear "a roaring white noise similar to a freight train." In a blog post, AccuWeather points out that these kinds of occurrences in the weather aren't definite signs, so if they do occur, there's no reason for additional alarm.