School officials in Sioux Falls are blaming unusually high heat and humidity for the growth of mold in six elementary schools.
School District Operational Services Director Jeff Kreiter says mold was found on classroom carpets and some walls. He says the affected areas have been cleaned and officials plan air quality tests.
Kreiter says when warm air in the buildings met cold classroom floors, condensation formed and surface mold began to grow. The schools were warmer than usual because of the temperature outside but also because air conditioners were turned off last weekend. Some elementary schools have had no air conditioning almost all summer because of cost-cutting measures.
Kreiter says the district will run air conditioners more often following the mold discovery.