SZ Emergencies

According to an article today in the Shenzhen Daily, the local government has implemented a plan to notify the city's 12 million official citizens about natural and other disasters that can endanger the lives of the people. Of course, that leaves out the millions of migrant workers, including foreigners. It also only applies to the Special Economic Zones, of which my district is not part. I guess this means that when the next typhoon hits, the majority of Shenzhen will know a week in advance while this district gets 15 minutes to evacuate. I just wonder how they'll handle any public health incident. Anyone remember Harbin about a year ago? How long did it take to alert the public?