Natural disasters happen all the time, even though this does not mean emergency preparedness is not important. The rain that fell on Zhengzhou at maximum intensity was about 4 times what we have received on
April 17 this year.
Zhengzhou is just unlucky to be affected by a confluence of very huge air masses interacting with each other at the same time.
Remember that we had experienced the rare event of Tropical Storm
Vamei not too long ago, which was also a product of interaction between several forces in a coincidental manner as well.