NEWMARKET, Ont. - Thousands of people north and northeast of Newmarket are waking up to flashing alarm clocks and other devices this morning.

Hydro One says the power went out to 5,262 customers overnight after a traffic accident.

The outage stretches from Holland Landing to Udora and nearly as far north as Baldwin.

Service has been restored by crews to some customers, although the utility doesn't expect everyone to have their electricity back until later this morning.