How to Survive a Nuclear Attack: 7 Steps That Can Save Your Life
Most people outside the blast zone can survive. Here is what FEMA and the CDC say to do in the first minutes, hours and days.
By Javed Khan · Medeoan Healthcare
Most of us picture a nuclear attack as the end of everything. That picture is wrong, and believing it costs lives.
The blast itself is devastating close to where it hits. But for the much larger number of people miles away, the biggest danger comes later: radioactive fallout, the dust that rises into the sky and settles back down over the following minutes and hours. Fallout is deadly, but it is also something you can protect yourself from, if you know what to do.
U.S. emergency agencies sum it up in six words: Get inside. Stay inside. Stay tuned. Ready.gov notes that fallout is most dangerous in the first few hours after a detonation, when it gives off the highest levels of radiation. That is exactly the window in which a few simple actions make the biggest difference.
This is not a prediction or an alert. It is the same kind of preparedness knowledge as knowing what to do in a fire or an earthquake. It takes about five minutes to read, and it is worth sharing with the people you care about.
The 7 steps that can save your life
1. Don’t look at the flash
A nuclear detonation produces a flash bright enough to cause temporary or permanent blindness, even from far away. The moment you see a sudden, intense light, turn away and close your eyes. Eye damage happens in a split second, before you even hear the blast.
2. Drop and cover
The shockwave can take several seconds to arrive, and it can come in more than one wave. If you are outside, lie flat on the ground, face down, behind anything solid. Cover your head and neck with your arms. If you are in a vehicle, stop safely and duck down.
If you are indoors, move away from windows. Flying glass causes many of the injuries in a blast. Get under a sturdy table or against an inner wall, and stay down until the shaking stops.
3. Get inside, fast
Once the shockwave passes, you typically have 10 minutes or more before fallout starts to arrive. Use that time to reach the best shelter you can. Brick or concrete buildings are best. Go to the basement or the middle of the building, away from the outer walls and the roof.
Cars, wooden sheds and tin structures offer very little protection. If that is all you have nearby, it is worth moving to a sturdier building within the first few minutes.
4. Take off your outer clothes
If you were outside after fallout began to fall, remove your outer layer of clothing as soon as you are inside. According to the CDC, this alone can remove up to 90% of the radioactive material on you. Take clothes off gently so the dust does not shake loose, seal them in a plastic bag, and put the bag away from people and pets.
5. Wash, but skip the conditioner
Shower with soap and shampoo if you can. Do not use hair conditioner: the CDC warns it causes radioactive material to stick to your hair. Don’t scrub hard or use very hot water, and keep cuts and scrapes covered.
No shower? Wash your hands, face and exposed skin at a sink. If there is no running water, wipe yourself down with a damp cloth or moist wipe. Gently blow your nose and wipe your eyelids, eyelashes and ears.
6. Stay inside for at least 24 hours
Ready.gov advises staying inside for 24 hours unless local authorities say otherwise. This is the hardest step, because every instinct tells you to find your family. Don’t. Family members should stay where they are and reunite later, once it is safe. Keep pets inside too.
Food in sealed packages and bottled water are safe to eat and drink. Wipe the outside of containers before opening them.
7. Stay tuned to official updates
Official guidance will tell you when it is safe to leave and where to go. Phones, texting, TV and internet may be disrupted, but battery-powered and hand-crank radios will still work. Follow FEMA, your state emergency management agency and local officials, and ignore rumors on social media.
If authorities tell you to take potassium iodide (KI), follow their instructions. Do not take it otherwise: KI only protects the thyroid gland, not the rest of the body.
Why waiting inside works: the 7–10 rule
Fallout loses its strength fast. Emergency planners use a rule of thumb called the 7–10 rule: for every sevenfold increase in time after a detonation, the radiation level drops about tenfold.
Time after detonation
Radiation left (approx.)
1 hour
100%
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7 hours
10%
49 hours (about 2 days)
1%
2 weeks
0.1%
In plain terms: the first few hours are by far the most dangerous, and every hour you stay behind concrete or brick cuts the dose your body absorbs. That is why leaving shelter early, even to find loved ones, is the single most dangerous decision people make. It is a planning estimate, not a meter reading, so always wait for official word that it is safe to go out.
What this means for home health agencies
Hospitals have walls, generators and staff on site. Home health patients have none of that. They are spread across a service area, often homebound, sometimes alone, and they depend on a nurse or aide who may not be able to reach them for a day or more.
That is why emergency preparedness is not optional for Medicare-certified agencies. Under the CMS Emergency Preparedness Rule (42 CFR 484.102), every home health agency must establish and maintain an emergency preparedness program. Agencies must also have primary and alternate ways to reach staff and emergency management agencies, review their program at least every two years, and run at least one testing exercise a year.
Surveyors check whether this works in practice, not just on paper. State surveys have cited agencies for failing to keep an individualized emergency plan in the patient’s home, and for missing procedures to tell local officials about homebound patients who need evacuation.
A radiological emergency is rare, but it tests the same things every emergency does. A few questions worth asking your team:
- Does each patient’s home plan say where they would shelter and how they would get updates if phones go down?
- Do patients and caregivers know the basics: get inside, stay inside, stay tuned?
- Do you know which patients depend on power, oxygen or daily visits, and who would check on them?
- Can your staff reach each other and local emergency officials if cell service fails?
- When did you last run a tabletop exercise, and did it include a scenario where staff cannot travel?
If any answer is “not sure,” that is the place to start.
Prepare now: a 15-minute checklist
Ready.gov recommends storing supplies for three or more days if possible. Most of what you need is already in your home:
- Water: about one gallon per person per day, for at least three days
- Food in sealed packages or cans, plus a manual can opener
- A battery-powered or hand-crank radio, with spare batteries
- Flashlight, phone power bank and a basic first-aid kit
- A week’s supply of prescription medicines and any medical supplies
- Plastic bags, plastic sheeting and tape, moist wipes and soap
- Know the best shelter spot at home, at work and at school: a basement or the center of a brick or concrete building
- Agree with your family, in advance, that everyone shelters where they are and reunites later
For anyone who cares for an older parent, a patient or a person with a disability, add their specific needs: oxygen, mobility aids, a list of medications and the phone numbers of their care team.
The bottom line
You do not need a bunker or special training to survive a nuclear emergency. You need to know seven things, and you need to know them before the moment comes, because there will be no time to look them up.
Share this with your family, your coworkers and anyone you care for. Preparedness is part of public health, and it works best when everyone has the same plan.
At Medeoan Healthcare, we work with home health agencies across the U.S. If you would like to talk about how your agency supports patients through emergencies, visit medeoan.com.
This article is for general awareness and is not a current alert. Always follow instructions from local authorities.
