  We present the Civique system for emergency detection in urban areas by
monitoring micro blogs like Tweets. The system detects emergency related
events, and classifies them into appropriate categories like "fire",
"accident", "earthquake", etc. We demonstrate our ideas by classifying Twitter
posts in real time, visualizing the ongoing event on a map interface and
alerting users with options to contact relevant authorities, both online and
offline. We evaluate our classifiers for both the steps, i.e., emergency
detection and categorization, and obtain F-scores exceeding 70% and 90%,
respectively. We demonstrate Civique using a web interface and on an Android
application, in realtime, and show its use for both tweet detection and
visualization.
