Smoke rises from debris on Saturday, August 15, near a crater that was at the center of a series of explosions in northeastern China's Tianjin municipality as seen from an aerial view. Chinatopix/AP
The Donghai Road light rail terminal station in Tianjin, China, is seen covered in debris on Monday, August 17. Explosions at a chemical warehouse left more than a hundred people dead and hundreds injured. Fire officials say hazardous chemicals stored at the warehouse were ignited by fire, but the fire's cause is still being investigated. Steven Jiang/CNN
A train with a smashed-up windscreen sits abandoned in the eerily deserted station on August 17. Steven Jiang/CNN
Smoke rises as damaged cars explode on Saturday, August 15. Yue Yuewei)/Xinhua/Sipa USA
Firefighters work August 15 at the site of the explosions. Stringer/AFP/Getty Images
Soldiers from the National Nuclear Biochemical Emergency Rescue Team launch a rescue mission August 15 at the core area of the explosion site. Wang Haobo/Xinhua/Sipa USA
Smoke rises from debris on August 15 near a crater at the center of where the explosions took place. Chinatopix/AP
Scattered debris is seen August 15 at the site of the explosions. Stringer/AFP/Getty Images
Volkswagens lie burned near ruined buildings on Friday, August 14. FRED DUFOUR/AFP/Getty Images
An aerial image taken shows toxic smoke rising from debris in Tianjin, a sprawling port city of more than 13 million people about 70 miles from Beijing. AFPTV/AFP/Getty Images
Firefighters wear protective gear while working as partially pink smoke billows nearby. The environmental group Greenpeace expressed concern "that certain chemicals will continue to pose a risk to the residents of Tianjin," and city residents shared similar fears on social media. Ng Han Guan/AP
Rescuers are seen near the site of the blasts. A Chinese military team of nuclear and chemical were conducting investigations as pressure grew on authorities to explain the cause of the fire and the resulting cataclysmic explosions. STR/Getty Images
Residents take their belongings as they evacuate from parts of the city. Managers of the warehouse facility have provided "insufficient information" about what was stored there, a city safety official said, though it is known that sodium cyanide, a highly toxic chemical that can rapidly kill humans exposed to it, was one of the stored materials.
GREG BAKER/Getty Images
Three men walk out onto the streets after being treated at a hospital on Thursday, August 13. GREG BAKER/GETTY
A Chinese police officer carries a man as civilians flee the area near the disaster. Ng Han Guan/AP
Fire and smoke is seen from a broken window of an apartment. STR/Getty Images
People walk among the crumpled remains of shipping containers. One of the explosions was estimated to be equivalent to 21 tons of TNT, or a magnitude-2.9 earthquake, according to the China Earthquake Networks Center. Ng Han Guan/AP
Chinese President Xi Jinping and Premier Li Keqiang called for "all-out efforts" to save the injured and minimize casualties, the state-run Xinhua news outlet reported. GREG BAKER/Getty Images
Over 1,000 firefighters were called in to put out secondary fires caused by the explosions. GREG BAKER/Getty Images
People sleep in a classroom at a primary school used as a makeshift emergency evacuation center. ChinaFotoPress/Getty Images
A bandaged man eats in a hospital in Tianjin. Ng Han Guan/AP
A firefighter grimaces as he is examined for injuries. Seventeen firefighters were among the people killed, officials said. Chinatopix Via AP
An injured survivor is brought to a hospital following the explosion. STR/Getty Images
Fires continued to burn near the site of the explosions in the early hours of Thursday, August 13. TPG/Getty Images
A photographer captures the plume of the second, and most massive, of the series of explosions. ChinaFotoPress via Getty Images
The initial explosion erupts Wednesday night, August 12 at a warehouse owned by Rui Hai International Logistics Co. Executives of the company were taken into custody, state media reported on August 13. STR/AFP/AFP/Getty Images