For more than two months, the city of Wuhan, China, was sealed off from the outside world. Flights in and out were canceled. Train and bus routes were suspended. Highway entrances were blocked.

There is little relief in sight, and the Yangtze River is now above flood level, according to China ... and it runs through major cities, such as Wuhan, with 10 million people.

Wuhan's digital transformation has advanced with applications for smart weather forecasting, flood control, firefighting, and urban waterlogging management. These efforts have reduced gas accidents by ...