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Indiana Department of Homeland Security

IDHS > About IDHS > Get Prepared > Terrorism > Nuclear Nuclear

A nuclear bomb creates an explosion that will have an intense blast wave and produce radioactive material which will be deposited over a large area contaminating the air, water, and other surfaces. The bomb also has an extremely bright flash and intense heat associated with it. Radioactive material can cause death.

If There is a Warning:

  • If a warning occurs, take cover immediately. Underground is the safest place to receive protection from the blast.
  • Do NOT look at the explosion - the flash could blind you.
  • Get on the ground face down, turn away, cover your eyes and place your hands under your body.
  • Caution: A blast wave may take 20-30 seconds to reach you so remain down until it passes.
  • Immediately seek shelter and start to isolate yourself from the outside.
  • Shield yourself from possible radiation exposure.
  • The further you can get away from the blast, the better.
  • Minimize the time you are exposed to any possible radiation.

If There is No Warning:

  • Shield yourself from possible radiation exposure.
  • Cover eyes and nose with a piece of cloth while running to shelter.
  • Remove any dirt or debris that might be on your clothing.
  • Put clothes in plastic bags and seal them tightly then put them in a room far away from you.
  • Take a shower and scrub with lots of soap and water.
  • Finally, you can start to tape off a room that you will stay in
  • Bring plenty of supplies.
  • Close vents, turn off a/c or heater, turn off fans, close fireplace dampers, lock all doors, and close and lock windows.
  • The further you can get away from the blast, the better.
  • Minimize time spent in the radiation zone.
  • Most radiation from the blast will travel with the wind. Try and stay up wind.
  • Don't stay outside longer than you have to. Get in and get clean as soon as possible.
  • Eat only stored food, nothing fresh.
  • Listen to radio and watch TV in order to find out what actions need to be taken.