In this photo taken Thursday, Aug. 13, 2015, a man walks past the charred remains of new cars at a parking lot near the site of an explosion at a warehouse in northeastern China\'s Tianjin municipality. Rescuers have pulled a survivor from an industrial zone about 32 hours after it was devastated by huge blasts in Chinaâs Tianjin port. Meanwhile, authorities are moving gingerly forward in dealing with a fire still smoldering amid potentially dangerous chemicals. (AP Photo/Ng Han Guan)

In this photo taken Thursday, Aug. 13, 2015, a man walks through the site of an explosion at a warehouse in northeastern China\'s Tianjin municipality. Rescuers have pulled a survivor from an industrial zone about 32 hours after it was devastated by huge blasts in Chinaâs Tianjin port. Meanwhile, authorities are moving gingerly forward in dealing with a fire still smoldering amid potentially dangerous chemicals. (AP Photo/Ng Han Guan)

In this photo taken Thursday, Aug. 13, 2015, a man stands near the charred remains of new cars at a parking lot near the site of an explosion at a warehouse in northeastern China\'s Tianjin municipality. Rescuers have pulled a survivor from an industrial zone about 32 hours after it was devastated by huge blasts in Chinaâs Tianjin port. Meanwhile, authorities are moving gingerly forward in dealing with a fire still smoldering amid potentially dangerous chemicals. (AP Photo/Ng Han Guan)

Charred remains of new cars are seen in a parking lot near the site of an explosion at a warehouse in northeastern China\'s Tianjin municipality, Friday, Aug. 14, 2015. Explosions that sent huge fireballs through China\'s Tianjin port have disrupted the flow of cars, oil, iron ore and other items through the world\'s 10th largest port. (AP Photo/Ng Han Guan)

A window shattered by the shockwaves frames the site of an explosion at a warehouse in northeastern China\'s Tianjin municipality, Friday, Aug. 14, 2015. Explosions that sent huge fireballs through China\'s Tianjin port have disrupted the flow of cars, oil, iron ore and other items through the world\'s 10th largest port. (AP Photo/Ng Han Guan)

Workers sweep the area near deformed containers piled up after Wednesday\'s explosion in northeastern China\'s Tianjin municipality, Friday, Aug. 14, 2015. Rescuers pulled out a firefighter trapped for 32 hours after responding to a fire and huge explosions in the Chinese port city as authorities dealt Friday with a fire still smoldering amid potentially dangerous chemicals. (AP Photo/Ng Han Guan)

Damaged buckets are seen at the site of the explosions in Tianjin on August 15, 2015. Residents near the site of two giant explosions in the northern Chinese port city of Tianjin were being evacuated on August over fears of toxic contamination, state media said. CHINA OUT AFP PHOTO (Photo credit should read STR/AFP/Getty Images)

A damaged fire truck belonging to a Tianjin fire brigade is seen at the site of the explosions in Tianjin on August 15, 2015. Residents near the site of two giant explosions in the northern Chinese port city of Tianjin were being evacuated on August over fears of toxic contamination, state media said. CHINA OUT AFP PHOTO (Photo credit should read STR/AFP/Getty Images)

A rescuer walks past damaged cars at the site of the explosions in Tianjin on August 14, 2015. Enormous explosions in a major Chinese port city killed at least 44 people and injured more than 500, state media reported on August 13, leaving a devastated industrial landscape of incinerated cars, toppled shipping containers and burnt-out buildings. CHINA OUT AFP PHOTO (Photo credit should read STR/AFP/Getty Images)

A Chinese firefighter adjusts his mask as he waits to be activated near the site of an explosion in northeastern China\'s Tianjin municipality Saturday, Aug. 15, 2015. State media reported that the casualties of the first three squads of firefighters to respond and of a neighborhood police station have not yet been determined, suggesting that the death toll could still go up. (AP Photo/Ng Han Guan)

Chinese firefighters rest as they wait to be deployed near the site of an explosion in northeastern China\'s Tianjin municipality Saturday, Aug. 15, 2015. State media reported that the casualties of the first three squads of firefighters to respond and of a neighborhood police station have not yet been determined, suggesting that the death toll could still go up. (AP Photo/Ng Han Guan)