how long after an event for things to die down

[Scythe13]

I've only said 6 months because it is entirely dependant on what the situation is.

After about 3 months the majority of the damage will be over or contained. After that it is entirely situationally dependant.

New Orleans was 'stabilised' after a few months. The London Riots ended after a week or 2. The nuclear plants over in Japan got sorted in about 2 months. So I'm going with a 3 month containment period. But it does depend on the situation.