TIANJIN, China — New explosions and fires rocked the Chinese port city of Tianjin on Saturday, as one survivor was pulled out and authorities ordered evacuations to clean up chemical contamination more than two days after a fire and a series of blasts set off the disaster.

Meanwhile, angry relatives of firefighters missing in the catastrophe stormed a government news conference to demand information on their loved ones.

The death toll in Wednesday’s inferno and blasts that devastated industrial and residential zones climbed to 85, including 21 firefighters — making the disaster the deadliest for Chinese firefighters in more than six decades.

An unknown number of firefighters remain missing.