Power Outages In the event of a power outage, lines down, an electrical emergency, or if you have details relating to an outage, please contact Halton Hills Hydro Inc. using the numbers below. If this is a life threatening emergency, please call 911. Report an Outage by Telephone: 519-853-3701 Report a Power Outage All Power has been restored. If you are still experiencing power issues, please call 519-853-3701. Posted: 2017-04-27 14:09:09.000000 Know your responsibilities: View information on Residential Demarcation Points.