High temperatures combined with "extensive" lightning sparked more than 100 wildfires in northern Alberta over the weekend, the Ministry of Sustainable Resource Development says.

Fast action by provincial firefighting crews helped contain the vast majority of the 138 wildfires sparked in the forest protection area since Friday afternoon.

As of Sunday morning, firefighters had contained or extinguished 127 wildfires.

The remaining 11 fires burning are classified as out of control, but none currently threaten any Alberta communities.

The out-of-control wildfires are north of Edmonton in the Slave Lake, Lac La Biche and Fort McMurray areas.

The largest fire, 45 km north of Calling Lake, is about 25 square kilometres in size. More than 300 firefighting personnel, 22 airtankers, 45 helicopters and several pieces of heavy equipment are battling that blaze.

Since the April 1 start of the fire season, Alberta has responded to over 800 wildfires in the province's forests, burning more than 70 square kilometres of forest land.