A heat wave combined with a chemical treatment for weeds proved to be deadly to some fish in Bon Aire Lake, according to the executive director of Merrillville Stormwater Utility.
Matt Lake said about 100 fish died recently in an isolated incident in the 21-acre lake when the heat index rose to 110 degrees the day after the lake was treated for algae, duckweed and other noxious weeds.
“Some fish suffocated. It happens, primarily at the outlets of the lake,” Lake said.