More fires erupt at China explosion site

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TIANJIN, China -- Fires continue to break out at the site of a chemical warehouse explosion in Tianjin, China.

Officials have ordered more evacuations in the area amid fears of chemical contamination in the air. Authorities continue to assert that the air is safe.

The death call has risen to 85 people, including 21 firefighters. Many of them were killed after responding to initial reports of the fire late Wednesday. A series of explosions went off about 40 minutes after the first call. One of the blasts was the equivalent of more than 20 tons of TNT.

More than 700 people were injured and thousands are homeless.

Investigators have not names a cause for the blasts.