Above-Ground vs Underground: What Survives an EF5?

There’s always been one rule in Oklahoma during tornado season. Get underground.

That’s still the best odds when everything lines up wrong. But it’s not the only way people survive. And it never has been.

Most tornadoes that hit this state aren’t the monsters that make national documentaries. The bulk of them are EF0 to EF3. Strong, dangerous, capable of tearing up a roof or flipping a trailer, but survivable if you’re doing the basics right. Lowest floor. Small interior room. No windows. Putting as many walls between you and the outside as possible is the goal.

EF5 tornadoes are back in 2026. Here’s what actually works when it comes to above-ground and underground storm shelters in Oklahoma.

Types of Tornado Shelters

When you strip it down, there are two categories. Above ground and below ground. Everything is one or the other.

Underground shelters

The classic Oklahoma setup is reinforced concrete buried in the yard, usually a few steps from the back door. Some are fully underground with a flat lid at ground level. Others are partially buried, with a door angled into the earth. You see both all over the OKC metro and across the state.

They’re practical. They stay out of the way. They’ve saved a lot of lives.

Garage floor shelters are common in newer builds too. They’re poured into the slab and sealed with a steel door. The downside is obvious. There’s usually a vehicle parked on top of it. When warnings hit at dinner time and adrenaline kicks in, moving a car isn’t ideal.

Above-Ground Shelters

For a long time, a lot of folks around here didn’t trust anything above ground. That mindset was shaped in part by the May 3, 1999, outbreak, especially the Bridge Creek and Moore tornado. That storm reset expectations for what wind could do. It made underground feel like the only safe answer.

Then in 2011, the El Reno to Piedmont EF5 tore through central Oklahoma. Entire homes in Piedmont were reduced to slabs. And standing there, in the middle of that destruction, were reinforced above-ground safe rooms that had been built into those houses. Intact. Doors closed. People inside alive.

That Moment Changed Everything

These rooms are tied into a home’s slab and can take a beating. When properly installed to FEMA standards, they’re designed to remain anchored even when the rest of the house is taken. Time and time again, they’ve done exactly that.

Steel safe rooms are another option. You’ve probably seen them at Home Depot or local dealers. They look like thick steel cylinders that bolt to the slab of your home, even well after it has been built. That may seem a little questionable, but this is probably the fastest-growing shelter in terms of popularity. Primarily the larger steel "room" types of shelters that double as walk-in gun safes and such. A lot of Oklahomans look at the steel thickness and assume it won’t hold up in an EF5.

I did some digging and found something interesting. There's not a single documented case of someone being killed while inside a properly installed, NSSA-certified storm shelter. That includes both below-ground and above-ground, concrete and steel models built to that standard.

That doesn’t mean all shelters are equal. Certification, installation, and anchoring matter. A box in the corner isn’t protection if it’s not engineered and secured correctly, but neither is a concrete shelter if it's not anchored correctly. That's probably why the old belief that "only underground works" just doesn’t hold up anymore.

The Bottom Line

If you’ve got underground access, use it. If you’ve got a properly built above-ground safe room, use that. If you’ve got neither, get to the lowest level, interior room, away from windows, and cover up.