it depends how close your home is to the point of explosion. If it's too close you'll be vaporized, if you're talking about protecting yourself from nuclear fallout, i dont think there's really that much you can do as far as homemade things are concerned.

Pick some Wiki software. MediaWiki is the package used by WikiPedia, but there are lots of options out there and different packages are better for different people (I tend towards Kwiki myself).

Then check the system requirements (e.g. Mediawiki needs PHP 5.0 or newer and one of its supported Database servers).

Next up, you need web hosting that meets the system requirements of the software. If you already have web hosting, then you should probably check out what features it provides and then pick the wiki software based on that rather than the other way around.

Then follow the installation instructions for the wiki software. If you run into problems, then you can probably get support from the software authors / community / vendor.

You could also consider getting web hosting that comes with wiki software. A search finds quite a few options including:

Once you are up and running, be prepared to police the changes that people make. Spammers love to put links to their sites on other people's wikis to boost their PageRank in search engines.

http://www.hair.com or http://www.meatspin.com

I think if it was a nearby explosion you wouldn't want to survive. The radiation poisoning would just cause a long, painful death. I'd rather go out with the first blast and get it over with.