BE PREPARED FOR A
NUCLEAR
EXPLOSION
FEMA P-2149/March 2018
Nuclear explosions can cause
significant damage and casualties
from blast, heat, and radiation
but you can keep your family safe
by knowing what to do and being
prepared if it occurs.
A nuclear weapon is a device that uses a
nuclear reaction to create an explosion.
Nuclear devices range from a small
portable device carried by an individual
to a weapon carried by a missile.
A nuclear explosion may occur with a
few minutes warning or without warning.
BRIGHT
FLASH
can cause
temporary
blindness for
less than a
minute.
BLAST
WAVE
can cause
death, injury,
and damage
to structures
several miles
out from the
blast.
RADIATION
can damage
cells of the
body. Large
exposures
can cause
radiation
sickness.
FIRE AND
HEAT
can cause
death, burn
injuries, and
damage to
structures
several miles
out.
ELECTROMAGNETIC
PULSE (EMP)
can damage
electronics several
miles out from the
detonation and
cause temporary
disruptions
further out.
FALLOUT
is radioactive,
visible dirt and
debris raining
down that can
cause
sickness to
those who are
outside.
Fallout is most dangerous in the first few hours after the detonation when it is giving off the highest levels of radiation. It takes
time for fallout to arrive back to ground level, often more than 15 minutes for areas outside of the immediate blast damage
zones. This is enough time for you to be able to prevent significant radiation exposure by following these simple steps:
GET INSIDE
Get inside the nearest building
to avoid radiation. Brick or
concrete are best.
Remove contaminated
clothing and wipe off or wash
unprotected skin if you were
outside after the fallout arrived.
Go to the basement or middle
of the building. Stay away from
the outer walls and roof.
STAY INSIDE
Stay inside for 24 hours unless
local authorities provide other
instructions.
Family should stay where
they are inside. Reunite later
to avoid exposure to dangerous
radiation.
Keep your pets inside.
STAY TUNED
Tune into any media available
for official information such
as when it is safe to exit and
where you should go.
Battery operated and hand
crank radios will function after
a nuclear detonation.
Cell phone, text messaging,
television, and internet
services may be disrupted or
unavailable.
HOW TO STAY SAFE
IN THE EVENT OF A NUCLEAR EXPLOSION
Prepare
NOW
Identify shelter locations. Identify the best
shelter location near where you spend a lot
of time, such as home, work, and school. The
best locations are underground and in the
middle of larger buildings.
While commuting, identify appropriate
shelters to seek in the event of a
detonation.
Outdoor areas, vehicles and mobile homes
do NOT provide adequate shelter. Look for
basements or the center of large multi-story
buildings.
Make sure you have an Emergency Supply
Kit for places you frequent and might
have to stay for 24 hours. It should include
bottled water, packaged foods, emergency
medicines, a hand-crank or battery-
powered radio to get information in case
power is out, a ashlight, and extra batteries
for essential items. If possible, store supplies
for several days.
Survive
DURING
If warned of an imminent attack,
immediately get inside the nearest
building and move away from windows.
This will help provide protection from
the blast, heat, and radiation of the
detonation.
If you are outdoors when a detonation
occurs take cover from the blast behind
anything that might offer protection. Lie
face down to protect exposed skin from
the heat and ying debris. If you are in a
vehicle, stop safely, and duck down within
the vehicle.
After the shock wave passes, get inside the
nearest, best shelter location for protection
from potential fallout. You will have 10
minutes or more to nd an adequate shelter.
Be inside before the fallout arrives. The
highest outdoor radiation levels from
fallout occur immediately after the fallout
arrives and then decrease with time.
Stay tuned for updated instructions from
emergency response ofcials. If advised
to evacuate, listen for information about
routes, shelters, and procedures.
If you have evacuated, do not return until
you are told it is safe to do so by local
ofcials.
Be Safe
AFTER
Immediately after you are inside shelter, if
you may have been outside after the fallout
arrived:
Remove your outer layer of contaminated
clothing to remove fallout and radiation
from your body.
Take a shower or wash with soap and water
to remove fallout from any skin or hair that
was not covered. If you cannot wash or
shower, use a wipe or clean wet cloth to
wipe any skin or hair that was not covered.
Clean any pets that were outside after the
fallout arrived. Gently brush your pet’s coat
to remove any fallout particles and wash
your pet with soap and water, if available.
It is safe to eat or drink packaged food
items or items that were inside a building.
Do not consume food or liquids that
were outdoors uncovered and may be
contaminated by fallout.
If you are sick or injured, listen for
instructions on how and where to get
medical attention when authorities tell you it
is safe to exit.
Where to go in a Radiation
Emergency
Take an Active Role in Your Safety
Download the FEMA app to get more information about
preparing for a nuclear explosion.
Go to Ready.gov: Ready.gov/radiation
Go to the Centers for Disease Control:
https://emergency.cdc.gov/radiation
Go to Health & Human Services:
https://remm.hhs.gov/nuclearexplosion.htm
FEMA P-2149