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Oklahoma Storm Shelter Education
If you've lived in Oklahoma for any length of time, you've heard a meteorologist mention an "EF rating" during severe weather coverage. Here's what those numbers actually mean, why they matter for your home, and how storm shelters Oklahoma families rely on fit into the bigger picture of staying safe.
Scroll Down to Read ArticleThe Enhanced Fujita Scale, usually just called the EF Scale, is the tool meteorologists use to classify a tornado's strength after the fact.
It runs from EF0 to EF5, and each number reflects estimated wind speeds based on the damage left behind. The scale doesn't measure wind speed directly with instruments during the storm. Instead, survey teams look at things like how trees snapped, how roofs peeled away, and how walls collapsed, then match that damage to one of 28 different indicators the scale uses.
This system replaced the original Fujita Scale, which had been used since the early 1970s. The original version was groundbreaking for its time, but researchers eventually found that it overestimated wind speeds for some types of damage and underestimated others. The Enhanced Fujita Scale, adopted in 2007, fixed a lot of those inconsistencies by accounting for how different structures, from barns to brick homes to shopping centers, actually respond to wind.
For homeowners across Oklahoma City and the rest of the state, the EF Scale is mostly something you hear about on the news after a storm has already passed. But understanding it helps explain why storm shelters aren't just an extra precaution here. They're a practical response to the kind of weather Oklahoma sees almost every spring.
It might seem strange that we rate tornadoes after they've already happened rather than during. But tornadoes are notoriously difficult to measure directly. Most don't pass anywhere near a weather instrument, and even mobile radar units can only estimate wind speeds within the funnel itself, not necessarily at ground level where the damage occurs. Damage surveys give meteorologists a consistent, repeatable way to compare one tornado to another, even decades apart.
Here's a simplified look at what each rating generally represents in terms of wind speed and the kind of damage typically associated with it. Keep in mind that these are general ranges, and actual damage depends heavily on construction quality, how long the tornado stays on the ground, and what's directly in its path.
| Rating | Estimated Wind Speed | Typical Damage |
|---|---|---|
| EF0 | 65–85 mph | Minor roof damage, broken branches, damaged gutters |
| EF1 | 86–110 mph | Roofs stripped, mobile homes overturned, windows broken |
| EF2 | 111–135 mph | Roofs torn off frame houses, mobile homes destroyed, large trees snapped |
| EF3 | 136–165 mph | Entire stories of houses destroyed, trees debarked, trains overturned |
| EF4 | 166–200 mph | Whole houses leveled, cars thrown significant distances |
| EF5 | Over 200 mph | Well-built homes swept away, structural deformation of high-rises |
Most tornadoes that touch down in Oklahoma fall in the EF0 to EF2 range. Those are still dangerous, especially if you're caught outside or in a mobile home, but they're far more common than the violent EF4 and EF5 tornadoes that tend to make national headlines. The catch is that Oklahoma sees more than its fair share of those rare, violent tornadoes too, which is part of why Be Safe Storm Shelters exists in the first place.
Once you get into EF3 territory and beyond, the type of structure you're in starts to matter enormously. A standard interior room or closet might offer reasonable protection from an EF1, but it's not designed to withstand the kind of structural failure that happens during an EF3, EF4, or EF5 event. This is the gap that a properly built below ground concrete shelter or reinforced garage shelter is designed to close.
Oklahoma sits squarely inside what's commonly called Tornado Alley, the region of the central United States where warm, moist air from the Gulf collides with dry air from the high plains and cold fronts moving in from the north. That collision is a recipe for the kind of severe thunderstorms that spin up tornadoes, and it happens with enough regularity that spring storm season is practically circled on the calendar for a lot of Oklahoma families.
Communities across Central Oklahoma, including Oklahoma City, Moore, Norman, Edmond, Yukon, and Mustang, have all experienced tornadoes rated EF3 or higher within recent decades. That's not meant to be alarming. It's just the reality of living here, and most longtime residents already build their spring routines around it, whether that means keeping a weather radio charged or knowing exactly where they'll go if a warning is issued.
A tornado watch means conditions are favorable for tornadoes to form in your area — a heads-up to stay aware, charge your phone, and know your plan. A tornado warning means a tornado has been spotted or indicated by radar, and it's time to get to your safe space immediately. The EF rating isn't assigned until after the storm, so during a warning you're not waiting to find out how strong it might be. You're already moving to shelter.
We get asked a lot whether one type of shelter is "rated" for a specific EF level. The honest answer is that a well-built shelter, whether it's a garage above ground unit, a garage below ground unit, or an outdoor slope front shelter, is built with the strongest tornadoes in mind from the start. The differences between shelter types come down to placement, space, and how they fit your property, not a tiered "this one is for weaker storms" approach.
Popular across Oklahoma City and Edmond because they're convenient. You reach them quickly from inside the house without going outside, which matters if a warning comes in the middle of the night or during heavy rain. Above ground units sit on the existing floor, while below ground units install into the slab for a flush entry point.
Below ground concrete, below ground steel, and slope front designs suit homes where the garage isn't practical, or families who want extra room. Slope front shelters are popular in Norman and Moore because their angled entry makes it easier to get in and out quickly when every second counts.
One of the most common questions we hear is whether an above ground or below ground shelter makes more sense. Both options, when properly engineered and installed, are built to provide a high level of protection. The decision usually comes down to your property, your garage layout, and personal preference.
| Factor | Above Ground (Garage) | Below Ground (Garage or Outdoor) |
|---|---|---|
| Installation | Sits on top of existing floor, minimal excavation | Requires excavation into slab or yard |
| Floor Space | Takes up some visible floor space | Flush with floor or ground when closed |
| Access | Step inside through a standard door | Climb down via stairs or ladder, or walk in for slope front |
| Best For | Garages where digging isn't ideal | Homeowners wanting a flush, out-of-the-way option |
Neither option is objectively "better." We've installed plenty of above ground garage shelters for families in Yukon and Mustang who wanted a fast installation with no digging, and just as many below ground units for families in Norman who preferred the flush profile. A quick walkthrough of your garage or yard usually makes the right choice pretty obvious.
Material choice is another area where personal preference plays a big role. Both concrete and steel below ground shelters are common across our service area, and both have loyal fans.
Both options, when installed by an experienced crew, hold up well across Oklahoma's climate. We walk every homeowner through the differences during a free consultation so the choice fits both your property and your preferences, not just a generic recommendation.
A storm shelter is the centerpiece of tornado preparedness, but it works best as part of a bigger plan. Here's what we recommend to families across Oklahoma City, Edmond, and beyond.
Decide ahead of time what conditions will send your family to the shelter. For most households, a tornado warning for your county is the trigger, full stop, no debate in the moment. Waiting to "see how it looks outside" costs precious time, especially at night when a tornado may not be visible until it's very close.
Kids handle severe weather better when it's familiar rather than scary. Walking through the plan during calm weather, including a practice trip to the shelter, helps remove the fear factor when an actual warning comes through. Keep the tone matter-of-fact, similar to how schools handle fire drills.
At the start of each spring storm season, take a few minutes to check your shelter's supplies. Replace batteries, check water for expiration, and make sure the door and latch open smoothly. It's a small task that takes maybe fifteen minutes but makes a real difference if you ever need to use the shelter in a hurry.
A reliable way to get warnings, whether that's a NOAA weather radio, a trusted weather app, or local news coverage, is essential. Cell service can become unreliable during severe storms, so having a battery-powered radio as a backup is worth the small investment. You can also check current conditions any time using our live radar page.
Costs vary based on shelter size, type, location, accessibility, and installation conditions, and that's really the honest answer. A few specific factors tend to come up most often:
Financing options may help spread out the investment, and available rebates may vary depending on your city or county, so it's worth asking about both when you request your quote. You can learn more on our financing and rebates page. The most accurate way to get pricing for your specific home is a custom estimate, which our team is happy to provide.
The Enhanced Fujita, or EF, Scale is the system meteorologists use to rate a tornado's strength after it passes, based on the damage it leaves behind. It replaced the original Fujita Scale in 2007 because that older version didn't fully account for how different building materials and structures respond to wind. The EF Scale uses 28 damage indicators, ranging from trees to shopping malls to homes, to estimate wind speeds more accurately. For Oklahoma homeowners, the practical takeaway is the same: the higher the number, the more dangerous the storm, and the more important it is to have a safe place to go.
A properly installed underground or reinforced storm shelter is designed to give your family a much safer space during violent tornadoes, including the strongest ones on the EF scale. The idea is to get below grade or behind reinforced concrete and steel, away from flying debris and structural collapse. We can't make guarantees about any individual storm, since every tornado is different, but the purpose of a shelter is to dramatically improve your odds compared to staying in a regular room of the house. Our team can walk you through how our shelters are built during a free consultation.
Costs vary based on shelter size, type, location, accessibility, and installation conditions. A small garage shelter for two or three people typically costs less than a larger outdoor concrete shelter built for a whole family or even neighbors. Site conditions matter too, since rocky soil, existing slabs, and tight garage spaces can all affect labor and materials. Financing options may help spread out the investment, and available rebates may vary by city or county. The best way to get an accurate number for your home is through a custom estimate from our team.
It depends on your home, your garage space, your yard, and how many people need to fit inside. Garage shelters, whether above ground or below ground, are popular because they're close to the house and don't take up yard space. Outdoor shelters, including below ground concrete, below ground steel, and slope front models, work well for homes without a usable garage spot or for families wanting a larger shelter. During a consultation, we look at your property and household size and recommend an option that fits both your space and budget.
Most installations are completed in a single day, though the timeline depends on shelter type and your property's conditions. Garage shelters generally involve less digging and can often be installed quickly, while outdoor shelters require excavation that can add time depending on soil and yard access. Our crews work efficiently because they install shelters every week across Oklahoma City, Edmond, Norman, Moore, and surrounding communities, and they'll explain what to expect before the crew arrives.
Capacity depends on the size and style you choose. Smaller garage units typically fit two to five people, which works for many households. Larger outdoor concrete or steel shelters, including slope front designs, can be sized to hold extended families or even allow room for neighbors. When you request a quote, let us know your household size and whether you'd like extra room, and we'll recommend sizing options to match.
A well-stocked shelter should include water, non-perishable snacks, a flashlight with extra batteries, a first aid kit, a battery-powered or hand-crank weather radio, and a phone charger or battery pack. If you have pets, keep a leash or carrier nearby. Families with young kids often add a small blanket or comfort item, since waiting out a storm can be stressful for children. Check your supplies at the start of every spring storm season to make sure batteries are fresh and water hasn't expired.
Yes, financing options may help spread out the investment of a storm shelter so it fits more comfortably into a household budget. Terms and availability can vary, so our team can walk you through current options when you request a quote. Many Oklahoma families find financing makes it possible to choose the shelter size and type that actually fits their needs, rather than settling for the smallest available option.
Available rebates may vary depending on where you live in Oklahoma, since some cities and counties have offered rebate programs to encourage residents to install shelters. Because these programs change and aren't available everywhere, the best approach is to ask our team during your consultation. We stay familiar with programs across our service area, including Oklahoma City, Edmond, Moore, Norman, Yukon, and Mustang, and can let you know what might apply to your address.
Storm shelters can be installed in existing homes, and most of our installations are for homes that have been standing for years. Garage shelters, both above ground and below ground, are installed directly into an existing garage floor. Outdoor shelters are installed in the yard near the home. Our crews are experienced working around existing structures, landscaping, driveways, and utility lines, so there's no need for new construction to add a shelter to your property.
Maintenance is fairly minimal, but a few habits help. Check the door and latch mechanism periodically to make sure it opens and closes smoothly, since dirt and debris can build up over time, especially on outdoor units. For below ground shelters, keep an eye out for water intrusion after heavy rain and address drainage early. Garage shelters should be kept clear of stored items that could block quick access. A quick inspection at the start of tornado season each year is usually enough.
We're based in Oklahoma City and serve homeowners throughout the entire state of Oklahoma. Our most frequent installations are in Oklahoma City, Edmond, Moore, Norman, Yukon, and Mustang, but we also regularly work with families in Stillwater, Shawnee, Enid, Lawton, Duncan, Ponca City, Ardmore, and Bartlesville. If you're unsure whether we cover your area, just give us a call and we can confirm quickly.
The EF rating itself doesn't change what shelter you need, because a well-built shelter is designed with the strongest tornadoes in mind regardless of the eventual rating a storm receives. What matters more is choosing a shelter sized correctly for your household and installed correctly for your property. The EF scale is mainly useful for understanding storm reports after the fact and for appreciating why having a shelter matters in Oklahoma, where violent tornadoes are part of life in Tornado Alley.
Whether you're comparing storm shelters Oklahoma options for the first time or upgrading from an older unit, understanding the EF scale helps explain why a well-built shelter is worth the investment for families across the OKC metro and beyond.
Reach out to Be Safe Storm Shelters for a free, no-pressure quote, or give us a call at (405) 815-0285 to talk through your options before the next storm season ramps up.
Fill out the form today to inquire about one of our shelters and we will reach out quickly with more info!
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