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LANARK - Thunderstorms that rumbled across the region early Saturday morning left more than 2,000 Hydro One customers west and south of Ottawa without power.

Electricity service was lost at 4:09 a.m. in most of Lanark County and not expected to be restored until about about 2 p.m., Hydro One Networks reported on its website.

The blackout affected the following areas: Clarendon, Sherbrooke South, Wolford, Dalhousie, Darling, South Elmsley, Oso, Olden, North Burgess, Lavant, Lanark, Perth, South Crosby, Bastard, Palmerston, North Sherbrooke, Bathurst, and Ramsay.

Isolated outages were also reported in Cumberland, Osgoode, Russell, Cornwall and in the Brockville and Cornwall areas.