Table 2.

Microblog topic discussion.

No.	Categories	Topic Description	Percentage
Topic 1	Typhoon Trajectory	Typhoon, Track, Landfall, Kilometers, Center, Wind-force, Sea level, Westbound, Distance …	12.4 %
Topic 2	Alert Notifications	Warning, Be Safe, Alert, Issue, Signal, Alarm Precaution, Tip, Reminder …	15.8 %
Topic 3	Emergency Response	Deployment, Emergency, Measures, Research, Reinforcement, Exhaustion, Closure, Organize, Against …	14.8 %
Topic 4	Rescue and Relief	Alarm, Firefighting, Rescue, Soldiers, Foundation, Supplies, Punchbowl, Donations …	11.2 %
Topic 5	Disaster Information	Late, Shut down, Canceled, Collapsed, Flash floods, Ferocious, Waterlogged, water outage, power outage …	45.8 %