00:00Weather that formed Toledo's thick fog may also have trapped spill chemicals near the ground.
00:05Visibility fell to nearly zero near the chemical release Tuesday night.
00:09Officials ordered people within one mile to leave, then expanded stay-indoors orders to three miles.
00:15The spill involved a chemical used to make plastics, paints, and coatings.
00:19But fog had already begun forming before the chemical entered the air.
00:23AccuWeather forecasters say warm air above cooler ground air likely acted like a lid.
00:28That may have kept chemicals from spreading upward and mixing with cleaner air.
00:33Particles from the spill could also have helped make the fog thicker.
00:37AccuWeather expected winds around five miles per hour Wednesday, allowing only limited clearing.
00:42More fog was expected Wednesday evening, possibly trapping chemicals again if the leak continued.
00:48City officials said the air's appearance could not show whether chemicals were present.
00:52Disclosure. This video contains stock footage and content created or enhanced using AI-assisted tools.
