On Sunday, it dispatched crews to Washington DC and the surrounding area to assist with power restoration efforts after a recent wind storm caused widespread outages.

According the company, three groups of approximately 200 employees will begin working with local utilities in the Baltimore, Virginia and Washington areas beginning Tuesday.

An estimated three million people are without power after massive storms hit the region. They're now dealing with a record breaking heat wave and have no air conditioning.

"Hydro One crews have a long standing history of assisting neighbouring utilities when help is needed the most, and this time is no exception," said Len McMillan, a spokesman with Hydro One. "Our crews are ready and willing to do what they do best - help restore power quickly and safely to impacted customers."

Two years back, Hydro One helped utilities in Vermont in the wake of a winter storm. In September 2008, crews travelled to Ohio to help restore power after the remnants of Hurricane Ike caused massive outages. Hydro One crews also provided assistance to Floridians following hurricanes in 2004 and 2005.

In 2007, Hydro One became the only non-U.S. utility to be awarded the Edison Electric Institute's Emergency Recovery Award in recognition of outstanding efforts in restoring electric service that has been disrupted by severe weather conditions or other natural events.