Harris County Sheriff Ed Gonzalez confirmed that smokes from explosions at the Crosby plan are not a danger for community, via Houston Public Media. THE LATEST: The smokes from explosions at the Arkema chemical plant in Crosby are not toxic, Harris County Sheriff Ed Gonzalez confirmed on Friday morning at a press conference. He compared the toxicity level of the smokes to those from a campfire's, based on experts opinions, he said. Crosby's authorities stressed that the so-called explosions at the chemical plant, which happened at 2 a.m. on Friday, are not so and they explained that the pop sounds came from containers erupting. Meanwhile, U.S. Vice President Mike Pence announced that he would travel to Corpus Christi to assess damages from Harvey and to meet with victims of the hurricane.  There is a mandatory evacuation order in effect for several communities near the Barker Reservoir in Fort Bend County. Officials there overnight upgraded the voluntary order to a mandatary one.