Hydro crews in Thunder Bay and around northwestern Ontario were pressed into action Wednesday as thousands were left without power.

In Thunder Bay, the local utility reported Wednesday morning that about 2,000 people were without power in areas south of the Kaministiquia River. The outage was reportedly caused by a tree hitting a power line.

Over 100 customers in the city's Intercity area were also without power Wednesday. Thunder Bay Hydro listed the cause as "weather related."

Most customers had power restored before 11 a.m.

To the east of the city, another 500 customers lost power in the Hurkett area, according to Hydro One, with restoration expected around 12:45 p.m.

Elsewhere in the northwest, Hydro One also reported on Wednesday that over 1,000 people were without power in the Kenora and Rainy River areas.

Trees on power lines or extreme weather were listed as causes of several of the outages.

Hydro One estimated power to be restored by late Wednesday afternoon, local time.