Over the past year, four people who lived in neighboring row homes in Tamaqua have died due to respiratory conditions.  But now authorities are linking their death to toxic black mold.  Recently it was discovered the two adjoining homes on Orwigsburg Street are infested with black mold.  Mold exposure can be deadly if not treated.  Mold thrives in warm damp conditions but it can live in harsh environments as well.  Some mold may not be visible but your body will know its there.