Tornadoes can sometimes form so quickly that little, if any, warning is possible, according to FEMA.
-- Grab a helmet
As Monday's tornado approached, football players at Southmoore High School were getting ready for practice. The coach rounded up the players and ordered them to put on their helmets, he told Fox Sports Southwest
The tornado just missed the school.
It's an important lesson: Protect your head. A 200 mph gust of wind can turn a stick into a lethal weapon, something even a $10 bicycle helmet might protect against.
-- Work with what you've got
There's a good chance that if a tornado approaches, you might not be near a storm shelter or a basement or your emergency kit, so it's important to use what you have at the time of the impact to increase your survival chances.
Emergency room doctors at Moore Medical Center pulled mattresses and blankets off hospital gurneys and used them to cover themselves and their patients as the tornado approached.
Those simple items might have saved lives as the tornado wiped out the hospital's second floor.
Workers and customers at a credit union got inside the bank vault, which proved to be the only thing standing after the tornado reduced the rest of the building to rubble.
Teachers and parents lay on top of kids at Briarwood Elementary, using their bodies to shield the children from debris as they rode out the storm.
The tornado wiped out the school and many sustained serious injuries, but everyone survived.