NOVA Chemicals was reporting elevated flaring Wednesday due to a process unit upset at its Corunna site.
The company said flaring is expected to last 8 to 12 hours, and extra noise and light are expected.
Company spokesperson Julia Iacovella said flaring is the only impact anticipated at this time.
"We apologize for the noise and light disturbances that this causes our neighbours and community," Iacovella said in a statement. "We are actively working to return the facility to normal operating conditions as soon as possible."
Information updates are being shared with the community via the CAER Industry Update Line (1-855-472-7642).