Blasts rocked Tianjin port area on Wednesday night, causing several causalities and millions of dollars in damage. The explosions happened in a warehouse storing hazardous materials. The risks of explosions of hazardous materials have grown with the surge in Chinese economy. The hazardous materials refer to chemical substances with inflammable, explosive, corrosive, poisonous and radioactive properties.

In recent years，there have been several such accidents.

Here are some of them.

Heavy smoke rises after huge explosions rock Tianjin Binhai New Area, August 13, 2015. [Photo/CFP]