This is a pretty cool site I stumbled across a year or so ago. Its an interactive map of current emergencies, worldwide, at any given time. It covers everything from Earthquakes, forest fires, disease pandemics, heat waves, Nuclear events, so and and so forth. Besides different categories, it also covers many different severities. Below the actual map, it lists, categorizes and rates these events on a scale from 0-5 bars. Check out the source link below, its pretty interesting.
Source -> http://hisz.rsoe.hu/alertmap/index2.php