few ideas of ways to deal with this, using public info that is ok to tap into..
for example in Seattle
http://www2.seattle.gov/fire/realTime91 ... PubTab.aspanother related product
http://www.depiction.com/basically the idea is that you give the software out to a social network of users that report in when they see things, that way your network is self supporting by the social network.
So I am a reporter for your software I am also a nerd by nature and keep APRS on, while I am out trying to get a youtube video of the fire that might make me rich and famous I click on my fire software with a APRS link that fire is here -> then it updates via whatever to your server network that collects and reports the data in combination with people also reporting that listen to fire scanners etc
as for technical feasible.. anything is possible :) just depends on how much you want to pay