Here is a storm shelter that could save your life from a tornado. The Twister Pod has enough room for 4 people. You may even be able to fit a pet or two inside. It has a cylindrical design with benches on both sides. It uses RedHead Anchor bolts (12 bolts with 4600 lbs of pressure per bolt).
This tornado shelter measures 4.3ft in diameter and 6ft tall. It is designed to withstand EF5 tornado winds (250+ mph). It has a triple locking mechanism but offers ample airflow when you are inside the shelter.