I've come back to my game now after a half hour. Everything seems fine - enough food, water and electricity.

But as I selected the first person to check their health, he was radiated about the half of their life. I checked all others. EVERYONE is radiated. What could happened? I have 40 dwellers in many different rooms. Is this a bug or was there another fallout? :-D


I found the reason as it happened again. My water reserve was on the edge of minimum which looks green but was too low for my dwellers. They get radiated. The radiation faded away after getting enough water for longer time.

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    Yep, low water supply makes dwellers susceptible to rad. – sss4r Jun 20 '15 at 12:24

The reason that happens i believe, is that the water purifier doesn't give you water, it purifies water you have. So if it shows water is low, it doesn't mean you have low water, it means your not purifying enough water that's safe to drink. (hints the radiation, or dirty water)

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    This sounds like a Fallout 4 answer, not a Fallout Shelter answer... – Tim S. Apr 22 '16 at 15:42

I think I know what might have happened.

In fallout shelter, if you bring a radiated person in from the wastelands, the radiation can spread. To see if your person has radiation damage, look at their Heath bar. If they do have it, there should be a bit of red in it. Make sure that if your dwellers Heath is a bit red when they get back, give them a radaway.

Hope I helped.

  • 1
    This answer is false. Radiation cannot spread. – Dallium Apr 17 '16 at 23:40

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