Hydro One Power Outages: Map & How to Report
Hydro One doesn't publish live data we can use, so we can't show a current count. Its official outage map shows power outages in Ontario.
PowerOutageTracker is independent and not affiliated with Hydro One. If you see a fallen power line, stay 10 metres away and call 911.
Where Hydro One operates
Predominantly rural Ontario; about 75% of the province's area
Ownership: Publicly traded on the Toronto Stock Exchange (H); Province of Ontario is the largest shareholder, about 47%
Hydro One reliability
Hydro One reported 45 hr 25 min without power per customer in 2025, with 4.56 interruptions per customer. The national figure was 10 hr 5 min in 2023, though it may be measured differently.
Scope: All events incl. major events and loss of supply, summed from the OEB cause codes. Excluding major events: 9.08 hours SAIDI, 3.31 SAIFI.
Source: Ontario Energy Board open data, RRR 2.1.4.2 System Reliability Indicators (2025 data)
Major power outages involving Hydro One
Events in our sourced list that name Hydro One
May 2022 derecho
May 21, 20222,406,654 customers affected
Fifteen Ontario distributors reported 1,852,005 customers interrupted, including 890,100 at Hydro One (60% of its base), 297,650 at Alectra and 180,946 at Hydro Ottawa (54%). Hydro One took about 250 hours to restore 90% of those affected, and Hydro Ottawa called the damage to its system worse than in the 1998 ice storm.
Source: Ontario Energy Board open data, RRR 2.1.4.2.10 Major Event Response Reporting
March 2025 Ontario ice storm
March 28, 20251,294,890 customers affected
Hydro One reported 1,133,000 customers interrupted, 76% of its base, and needed about 182 hours to restore 90% of them.
Source: Ontario Energy Board open data, RRR 2.1.4.2.10 Major Event Response Reporting
April 2023 Québec ice storm
April 5, 20231,125,000 customers affected
On the same date in Ontario, Hydro One reported 359,000 customers interrupted and Hydro Ottawa 163,448.
Source: Hydro-Québec via Newswire, Ice storm: update on the outages, April 8, 2023
Provinces and territories served
Hydro One FAQ
How do I report a power outage to Hydro One?
Call 1-800-434-1235; text WATTS (92887). It also takes reports online through the link on this page. If you see a fallen power line, stay 10 metres away and call 911.
What areas does Hydro One cover?
Predominantly rural Ontario; about 75% of the province's area
How reliable is Hydro One?
Hydro One reported 45 hr 25 min without power per customer and 4.56 interruptions per customer in 2025. Scope: All events incl. major events and loss of supply, summed from the OEB cause codes. Excluding major events: 9.08 hours SAIDI, 3.31 SAIFI.
Cite this page
You may reuse our derived data under CC BY 4.0 with attribution. Weather alerts contain information licensed under the Data Server End-use Licence of Environment and Climate Change Canada.
PowerOutageTracker.com. "Hydro One Power Outages." Accessed November 3, 2026. https://poweroutagetracker.com/world/canada/utilities/hydro-one