>>13701873That would be pretty unpleasant.
These kinds of bombshelters are useless for anything more than just 2 people.
Ideally you would want 2 bedrooms, a common area, and a bathroom. Plus an extra storage room for storing food and water if you have the space for it, a septic tank and a fresh water tank both of whom could store 500 gallons is better.
Like an animal burrow you would want more than 1 entrance should the first be destroyed.
A connection to an existing basement floor isn't a bad idea either if your foundation can take the construction to build one.
>>13701984You would have to wait until the second rain fall. Although the fallout would mostly subside with in 3 days after the bombs drop. Plenty of fallout would remain in the sky until it collects in rain. The first rain would contain the second large bulk of fallout, so the second would be what you need to wait for.
Depending on where you live that could be within a week to 6 months.