More than 6,000 Greater Sudbury Hydro customers were without electricity Tuesday night after a major outage affected New Sudbury and other parts of the city, sending utility crews into the field to investigate the cause and restore service.
Greater Sudbury Hydro said it was aware of the disruption affecting more than 6,000 customers in the New Sudbury area on August 11. Local reports also indicated outages in the Flour Mill and Donovan neighbourhoods, extending the impact beyond a single part of the city.
In an update issued shortly before 9 p.m., the utility said the problem was also affecting Hydro One’s system and that the two companies were in communication. Crews were dispatched to investigate while restoration work continued where possible.
No specific cause was confirmed in the initial update. That distinction matters because unplanned outages can result from several factors, including feeder supply problems, equipment trouble, severe weather, wildlife interference, vehicle collisions or damage to underground cables. Greater Sudbury Hydro lists all of those among possible causes of unexpected service interruptions.
Sudbury outage affects several neighbourhoods
The scale of the outage made it a significant local disruption. Greater Sudbury Hydro says its distribution system serves more than 47,800 customers across Greater Sudbury and the Municipality of West Nipissing, meaning the reported outage affected a substantial number of households and businesses at once.
The reference to Hydro One is also important because local distribution networks can be affected by problems elsewhere in the electricity system. However, the early update did not identify whether the disruption originated on Greater Sudbury Hydro infrastructure, Hydro One infrastructure or another part of the connected system.
Sudbury has dealt with other infrastructure disruptions this year. In March, a major winter storm disrupted roads and public services across Greater Sudbury and northeastern Ontario, bringing heavy snow, freezing rain and strong winds. Tuesday night’s outage is a separate event, and there was no confirmed information in the initial utility update linking it to weather.
Large outages elsewhere have shown how quickly restoration work can become complicated when crews must inspect multiple circuits or damaged infrastructure. Earlier this year, widespread Duke Energy outages affected thousands of customers across parts of the southern United States during a broader regional disruption. The situations are unrelated, but both show why utilities often avoid giving firm restoration times until crews have identified the fault.
What customers should do during an extended outage
For residents still without electricity, basic safety steps can reduce additional risks. Greater Sudbury Hydro advises customers to check circuit breakers or fuses first, particularly if nearby homes still have power, before reporting the outage.
Anyone who sees a downed power line should stay at least 10 metres away and treat the line as energized. Portable generators must be operated outdoors, and barbecues should never be used inside because of the risk from toxic gases.
Food safety can also become a concern if electricity remains off for several hours. According to Greater Sudbury Hydro, an unopened refrigerator can keep food cold for about four hours, while a full freezer can maintain frozen food for roughly 48 hours. A half-full freezer may keep food frozen for about 24 hours.
Customers can find current safety advice and outage preparation guidance through Greater Sudbury Hydro’s official outage safety page.
Crews investigate while customers wait for restoration
As of the initial Tuesday-night information, Greater Sudbury Hydro had confirmed the size of the outage, the impact in New Sudbury and communication with Hydro One, but had not announced a verified cause or a firm system-wide restoration time.
Restoration during a widespread outage can happen in stages. Some customers may regain electricity before others as crews isolate the affected equipment, reroute supply where possible or complete repairs.
That makes direct utility information more reliable than early estimates circulating online. Customers whose power remains off can report an outage to Greater Sudbury Hydro by phone at 705-675-7536 in Sudbury.
The confirmed picture from the initial response was that more than 6,000 customers were affected, New Sudbury was a major outage area, power was also reported out in the Flour Mill and Donovan neighbourhoods, Hydro One’s system was involved, and crews were investigating while working to restore electricity.
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