The efficient application of big data and AI in flood warning for small and medium-sized rivers has greatly improved China's ability to forecast floods, Liu added.

These technologies have played a major part in this year's flood prevention and control in China.

For instance, the technologies of 5G and VR have been introduced in the real-time water-level monitoring in Anqing, East China's Anhui province. The water condition filmed by panorama cameras can be transmitted to monitoring personnel through low-latency 5G signal. In addition, water levels can be observed by workers with VR glasses so that they can fully grasp the conditions of the river and the progress of disaster relief. As a result, the work efficiency has been significantly improved.

Thanks to the Internet of Things, urban drainage systems now have a "brain" to prevent waterlogging. In Fuzhou, East China's Fujian province and Guiyang, Southwest China's Guizhou province, areas that are more likely to have waterlog are marked on an electrical map shown on a big screen, so that in times of a heavy rain, relevant staff members can have a clear picture easily.

Apart from the state-of-the-art equipment, drones and AI robots are also must-have items in flood prevention and control.

Drones enjoy a natural advantage in disaster prevention and relief, as they are agile and free from the topographic condition, and have quick response and a wide scope of monitoring.

They can transmit high resolution pictures and videos of disaster sites to command centers. Armed with other equipment, drones can also search, locate and rescue those trapped. If armed with a night vision system, they can work all day round, and even dispatch relief supplies to those trapped.

Recently, robots for water rescues have been put into use in many places in China. The robot resembles a light boat, and can be controlled by a tablet computer or a controller. It can save three to four people every time.

If someone is trapped in a position with a fast-moving current and far away from the shore, the robots are able to move toward the position in full speed under the command of the control personnel so the drowning can hold onto it.