People react near a street after a blast at Binhai new district, in Tianjin municipality, China, August 12, 2015. A huge explosion hit an industrial area in the northeastern Chinese city of Tianjin late on Wednesday evening, triggering a blast wave felt several kilometres away and injuring at least 50 people, domestic media reported. (Photo by Reuters/Stringer)

Vehicles are seen burning after blasts at Binhai new district in Tianjin municipality, China, August 13, 2015. (Photo by Reuters/Stringer)

Residents gather near the site of an explosion at a port in northeastern China's Tianjin municipality, Thursday, August 13, 2015. Chinese state media reported huge explosions at the Tianjin port late Wednesday. (Photo by Ng Han Guan/AP Photo)

Chinese police help a man to safety near the site of an explosion in northeastern China's Tianjin municipality, Thursday, August 13, 2015. (Photo by Ng Han Guan/AP Photo)

A man takes a photo near a burnt drum that residents said flew from a nearby explosion seen in the background in northeastern China's Tianjin municipality, Thursday, August 13, 2015. Huge explosions sparked overnight at a warehouse for dangerous materials in the northeastern Chinese port of Tianjin killed at least 13 people, injured hundreds and sent massive fireballs into the night sky, officials and state media outlets said Thursday. (Photo by Ng Han Guan/AP Photo)

A dormitory destroyed by the shockwave of a nearby explosion is seen in the northeastern China's Tianjin municipality, Thursday, August 13, 2015. (Photo by Ng Han Guan/AP Photo)

A worker walks past dormitories damaged by the shockwave from a nearby explosion in the northeastern China's Tianjin municipality, Thursday, August 13, 2015. (Photo by Ng Han Guan/AP Photo)

Workers walk near a building with windows shattered by the shockwave from a nearby explosion in northeastern China's Tianjin municipality, Thursday, August 13, 2015. (Photo by Ng Han Guan/AP Photo)

An injured man walks out of a hospital catering to victims of an explosion in northeastern China's Tianjin municipality, Thursday, August 13, 2015. (Photo by Ng Han Guan/AP Photo)

A man stands near broken glasses after a nearby explosion shattered windows at a residential compound, in China's Tianjin municipality, Thursday, August 13, 2015. (Photo by Ng Han Guan/AP Photo)

In this photo released by China's Xinhua News Agency, smoke rise from the site of explosions from a nearby building in the Binhai New Area in northeastern China's Tianjin municipality, Thursday, August 13, 2015. (Photo by Yue Yuewei/Xinhua via AP Photo)

A man is pushed through an emergency ward at a hospital receiving victims of an explosion in northeastern China's Tianjin municipality, Thursday, August 13, 2015. (Photo by Ng Han Guan/AP Photo)

A man with his wounds bandaged eats a bun in a hospital receiving victims of an explosion in northeastern China's Tianjin municipality, Thursday, August 13, 2015. (Photo by Ng Han Guan/AP Photo)

Residents take photos of what appears to be a metal container thrown several kilometers from the site of an explosion in northeastern China's Tianjin municipality, Thursday, August 13, 2015. (Photo by Ng Han Guan/AP Photo)

Chinese police officers work near the site of an explosion at a port in northeastern China's Tianjin municipality, Thursday, August 13, 2015. (Photo by Ng Han Guan/AP Photo)

Evacuees line up for donated clothing at a temporary shelter at a primary school following explosions in northeastern China's Tianjin municipality, Thursday, August 13, 2015. (Photo by Chinatopix Via AP Photo)

An injured firefighter grimaces as he is examined in a hospital following explosions in northeastern China's Tianjin municipality, Thursday, August 13, 2015. (Photo by Chinatopix Via AP Photo)

An injured woman is treated inside a hospital following explosions in northeastern China's Tianjin municipality, Thursday, August 13, 2015. (Photo by Chinatopix Via AP Photo)

Evacuees line up for donated clothing at a temporary shelter at a primary school following explosions in northeastern China's Tianjin municipality, Thursday, August 13, 2015. (Photo by Chinatopix Via AP Photo)

Chinese police help a man to safety near the site of explosions in northeastern China's Tianjin municipality, Thursday, August 13, 2015. (Photo by Ng Han Guan/AP Photo)

A man crying about the death of his son collapses outside a hospital receiving victims of explosions in northeastern China's Tianjin municipality, Thursday, August 13, 2015. (Photo by Ng Han Guan/AP Photo)

Smoke billows from the site of an explosion in Tianjin, in northern China, on August 13, 2015. A series of massive explosions at a warehouse in the northern Chinese port city of Tianjin killed 13 people, state media reported on August 13, as witnesses described a fireball produced by the blasts ripping through the night sky. (Photo by Greg Baker/AFP Photo)

A man takes photos of damaged containers at the site of an explosion in Tianjin, northern China, on August 13, 2015. (Photo by Greg Baker/AFP Photo)

A man looks on as soke billows from the site of an explosion in Tianjin, northern China, on August 13, 2015. (Photo by Greg Baker/AFP Photo)

Fires burn at the site of an explosion in Tianjin, in northern China on August 13, 2015. (Photo by Greg Baker/AFP Photo)

Fire and smoke are seen after explosions at a warehouse on late Wednesday in Binhai New Area on August 13, 2015 in Tianjin, China. At least 17 people dead, 32 are in critical condition and at least another 400 injured during the explosions of a warehouse on late Wednesday in Binhai New Area in Tianjin, according to police authority. (Photo by Tong Yu/CNSPHOTO/ChinaFotoPress via Getty Images)

Smoke rises from the site of a series of explosions in Tianjin on August 13, 2015. A series of enormous explosions at an industrial area in the Chinese port of Tianjin killed at least 44 people and injured hundreds, state media reported August 13, unleashing a fireball that ripped through the night sky. (Photo by AFP Photo)

Damaged cars and containers are seen at the site of a series of explosions in Tianjin on August 13, 2015. (Photo by AFP Photo)

The Tianjin port gate is seen in the foreground as smoke rises from the site of a series of explosions in Tianjin on August 13, 2015. (Photo by AFP Photo)

Damaged vehicles are seen as smoke rises from the site of a series of explosions in Tianjin on August 13, 2015. (Photo by AFP Photo)

A damaged warehouse is seen at the site of a series of explosions in Tianjin on August 13, 2015. (Photo by AFP Photo)

A car is seen in the debris following the explosions of a warehouse in Binhai New Area on August 13, 2015 in Tianjin, China. (Photo by ChinaFotoPress/ChinaFotoPress via Getty Images)

Rows of cars are burnt following the explosions of a warehouse in Binhai New Area on August 13, 2015 in Tianjin, China. (Photo by ChinaFotoPress/ChinaFotoPress via Getty Images)

Rescuers are seen in a van near the site of the blasts at Binhai new district in Tianjin municipality, China, August 13, 2015. (Photo by Reuters/Stringer)

Firefighter's trucks are pictured in front of heavy smoke rising behind shipping containers after blasts at Binhai new district in Tianjin municipality, China, August 13, 2015. (Photo by Reuters/Stringer)

A damaged vehicle is seen near the site of the blasts at Binhai new district in Tianjin municipality, China, August 13, 2015. (Photo by Reuters/Stringer)

A man wears a mask while resting outside after explosions hit Binhai new district, Tianjin, August 13, 2015. (Photo by Reuters/Stringer)

A man checks his mobile phone near overturned shipping containers after explosions hit the Binhai new district, Tianjin, August 13, 2015. (Photo by Reuters/Stringer)

Damaged vehicles are seen under bridges close to the site of the explosions at Binhai new district, Tianjin, August 13, 2015. (Photo by Reuters/Stringer)