The Chattanooga Fire Department has blocked off Market Street from 11th Street to Martin Luther King, and 10th Street from Georgia to Broad.
EPB spokesperson John Pless said a manhole on Market St. was emitting smoke, possibly from underground power lines that could have been damaged by the heavy rains.
Pless said the fire department was on scene as a precaution, and that everything seemed to be fine. He said crews were inspecting the lines, and hoped to have the streets opened to traffic soon. If lines need to be replaced, he said 10th street in that two block area would likely be reduced to one lane.