(Sorry for my bad english, i hope you can understand it)
In my post i will focus on the usage of Ushahidi at a local crisis.
I think every region should have a website (if it doesn't have one already) that shows what roads are blocked, and in case of an flu epedemic where people with flu are.
This information all can be gathered with Ushahidi, people can sms if family members got a flu, or they pass a broken/closed road.
Ofcourse that are only two examples.