The concern of course is if a typhoon makes a direct hit on these coastal megacities with thousands of high rise buildings you end up with a lot of glass flying. Always a concern further south where Hong Kong usually runs out of tape for the windows when a big blow is approaching.
From the associated Press, September 14:
A major typhoon gathered strength Wednesday as it headed over open water toward the Chinese metropolis of Shanghai.
Heavy rain was reported in the city of more than 20 million people as Typhoon Muifa approached in the evening. The Hong Kong Observatory classified it as a severe typhoon with maximum sustained winds of 155 kilometers (96 miles) per hour.
All flights at Shanghai’s two main airports were canceled and authorities were evacuating people from construction sites and other risky areas, according to Chinese media reports.
The typhoon had been expected to make landfall in the afternoon in Zhejiang province, but it shifted slightly eastward, keeping it at sea and putting it on track for a direct hit on Shanghai....
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And from the U.S. Navy's Joint Typhoon Warning Center:
