Ontario's Hydro One announced on Sunday that about 200 workers would head to Baltimore, Virginia and Washington to help restore power.
NB Power is a member of the Mutual Assistance Group, which sends emergency crews to help restore electricity.
"The crews that participate initially are typically those that are the closest geographically and available. At this time, we are not part of the initial response, but we may become involved as the situation in Washington evolves," said Melissa Morton, an official with NB Power.
People in several eastern United States have been without power for several days during a record heat wave.
Millions of Americans along the eastern seaboard have been without power for days as the region copes with the aftermath of sudden storms and lightning strikes along with record temperatures.
Some two million customers from North Carolina to New Jersey and as far west as Illinois were without power Monday. Utilities warned that many neighbourhoods could remain in the dark for much of the week, if not beyond.
On Tuesday morning, 117,359 customers in the D.C.-area were still without power, according to the Pepco, the local utility, website. Since Friday, 18 deaths have been blamed on severe weather, most from trees falling on homes and cars.