Minneapolis tops the list.
"The Milwaukee metro area, buoyed by the lowest natural disaster risk of the cities we considered, ranks second. The Portland, Ore.,metro, which boasts the lowest crime rate, places third. Boston and Seattle are tied for fourth. Both benefit from low traffic fatality rates--Boston's is the lowest on our list, and Seattle's is the eighth-lowest. This is largely because they boast two of the most user-friendly mass transit systems in the country."