Building Design: http://www.unisdr.org/eng/about_isdr/isdr-publications/joint-pub/Handbook26-03-07.pdf
Disaster Statistics: http://www.unisdr.org/disaster-statistics/introduction.htm
Disaster Trends pdf: http://www.unisdr.org/disaster-statistics/pdf/isdr-disaster-statistics-occurrence.pdf
Disaster Statistics - Impacts: http://www.unisdr.org/disaster-statistics/pdf/isdr-disaster-statistics-impact.pdf
Economic Disaster Statistics - Top 50 countries: http://www.unisdr.org/disaster-statistics/pdf/isdr-disaster-statistics-50top-countries.pdf
2005 Disasters in numbers: http://www.unisdr.org/disaster-statistics/pdf/2005-disaster-in-numbers.pdf
http://www.cred.be/ site which has a "Disasters of the week" section !
Relief Web covers a very wide variety of disasters from natural to humanitarian and also provides excellent maps of population movements. A useful site for those looking for refugee data recently.
http://www.reliefweb.int/rw/rwb.nsf/doc106?OpenForm