Nuclear War Survival Checklist: What You Really Need

A nuclear war survival checklist is more achievable than most people assume. While a direct nuclear strike is unsurvivable at close range, the vast majority of a nuclear conflict’s casualties come from fallout, fire, and the collapse of supply chains: all of which are survivable with the right preparation. FEMA’s nuclear detonation planning guidance, Ready.gov’s “Nuclear Explosion” preparedness page, and decades of civil defence research all point to the same conclusion: sheltering in place immediately after a detonation is the single most life-saving action, and a prepared household dramatically improves survival odds.

This checklist covers everything from immediate post-detonation sheltering to long-term radiation protection, water purification, food storage, and the medical supplies that matter specifically in a nuclear scenario.

Fallout Shelter Preparation Checklist

The single most important action in a nuclear event is to get inside a substantial building immediately. FEMA’s Protection Factor (PF) ratings show how different shelter types reduce radiation exposure:

Your shelter preparation checklist for a basement or most-protected interior room:

• Identify your best shelter room NOW: central basement, away from windows, maximum mass between you and outside
• Heavy plastic sheeting (6-mil polyethylene) + duct tape: seal windows, doors, and vents during fallout phase
• Sandbags or heavy furniture around shelter room walls: adds radiation mass shielding
• Mattresses, sleeping bags, blankets: line walls of shelter room for additional shielding and comfort
• Battery-powered or hand-crank radio: NOAA emergency broadcasts give all-clear timing
• Bucket with lid + garbage bags: emergency toilet (do not use outdoor septic/plumbing if contaminated)
• All supplies listed below pre-positioned in shelter room before any crisis

Radiation Protection Checklist

• Potassium iodide (KI) tablets: IOSAT 130mg × 1 pack per adult, ½ pack per child 3–12; take only when directed by emergency management; protects thyroid from radioactive iodine
• Radiation dosimeter/personal detector: GQ GMC-500+ or Radex RD1503+ Geiger counter; know your exposure level (see our Geiger Counter guide)
• N100 respirator × 1 per person: filters radioactive particulate matter; much better than N95 for nuclear fallout
• Full-face respirator with P100 cartridges (3M 6800 series): for anyone who must be outdoors during fallout
• Tyvek protective suits × 2 per person: prevents contamination on skin/clothing
• Nitrile gloves (heavy duty) × 50 pairs: prevent contamination transfer
• Safety goggles (indirect vent) × 1 per person
• Large trash bags × 50: bag and seal contaminated clothing and materials
• Duct tape × 10 rolls: sealing shelter room, bagging contaminated items
• Decontamination soap and supplies: shower immediately upon exiting any contaminated area (use uncontaminated water only)

Water Safety in Nuclear Scenarios

Radioactive contamination of water supplies is a serious concern. Standard water filters DO NOT remove radioactive isotopes. Your water strategy for nuclear scenarios:

• Pre-stored water in sealed containers: Tap water stored before contamination is safe; 55-gallon drum or WaterBOB bathtub bladder filled immediately when alert is issued
• Sealed bottled water: Commercially sealed water bottles are safe from external contamination if seal is intact
• Ion-exchange resin filters (Seychelle or equivalent): specifically rated for radiological contaminants; standard Berkey/LifeStraw do NOT remove radioactive iodine or cesium
• Calcium hypochlorite (pool shock): treats biological contamination in water; doesn’t remove radiation but useful if biological agents are also present
• Water testing kit: for post-fallout assessment of local water sources

Food Storage Checklist for Nuclear Scenarios

Sealed food is safe from external contamination. Your food becomes unsafe only if radioactive particles get inside packaging before detonation.

• All existing food in sealed cans, sealed buckets, or factory-sealed packaging is safe
• White rice in sealed 5-gallon buckets with mylar bags: 25-year shelf life, radiation-safe packaging
• Freeze-dried food in sealed #10 cans or buckets: ideal; double-sealed against contamination
• Canned goods: wash exterior of cans before opening if potential surface contamination occurred
• Do NOT eat produce from potentially contaminated gardens post-fallout without radiation testing
• Do NOT eat meat from animals that grazed outdoors in fallout zone
• Minimum 30-day sealed food supply per person pre-positioned in shelter
• Manual can opener × 2 (power may be out)
• Camp stove + sealed fuel canisters × 20: for cooking inside shelter

Nuclear-Specific Medical Checklist

• Potassium iodide (IOSAT KI tablets): #1 nuclear-specific medical item; follow dosage instructions exactly
• Antioxidant supplements: Vitamin C, Vitamin E, and selenium have some evidence for reducing radiation cellular damage effects
• Anti-nausea medication: acute radiation sickness causes severe nausea; ondansetron (Zofran) or over-counter options
• Burn treatment supplies: thermal burns from nuclear flash are common well outside blast radius
• Eye wash solution: protect against flash burns and particulate contamination
• Wound care: penetrating trauma from shattered glass and structural debris is the most common injury type
• 30-day+ prescription medications: medical facilities will be overwhelmed
• Trauma kit (tourniquet, hemostatic gauze, pressure bandages)

Communications Checklist

• Hand-crank NOAA weather radio: government all-clear broadcasts; when it’s safe to exit shelter
• Shortwave radio: international broadcasts when domestic may be disrupted
• Ham radio transceiver: two-way communication; EMP can damage electronics (store in Faraday protection)
• Faraday bag for electronics: protects radio, phone, and dosimeter from EMP damage
• Physical family emergency plan: printed rally points, contact numbers, and meeting protocols
• Printed maps: GPS and digital maps fail; know your routes

72-Hour Action Plan: What to Do Immediately

If a nuclear event occurs or is imminent, follow this sequence:

1. GET INSIDE. Any substantial building is better than outside. Basement of brick or concrete building is best.
2. SEAL YOUR SHELTER. Plastic sheeting + duct tape over windows, doors, and vents. Turn off HVAC.
3. FILL WATER CONTAINERS. If time allows, fill WaterBOB and all available containers immediately.
4. TUNE TO NOAA RADIO. Follow official guidance on when to take KI tablets. Do not take without official direction.
5. STAY INSIDE FOR 24–72 HOURS. Fallout radiation decreases to 1/10th within 7 hours; 1/100th within 49 hours. The first 24–48 hours are critical.
6. DECONTAMINATE before final entry. If you must be outdoors briefly, remove and bag all outer clothing immediately upon re-entry. Shower with clean water before rejoining others in shelter.
7. WAIT FOR OFFICIAL ALL-CLEAR. Only exit when NOAA/government broadcasts indicate it is safe.

Key Products for Nuclear Preparedness