FAIRBANKS — Fire crews are making progress on a new 37-acre fire burning near the Alaska Highway southeast of Delta Junction. 

The Cummings Road fire was the largest of six new fires reported in Alaska on Saturday. A passing aircraft spotted the fire burning actively in black spruce, a tree known for fueling big wildfires. A helicopter, air tanker and crew of 22 people were initially assigned to the fire.

By Sunday afternoon, the fire had grown about 7 acres from the initial estimate, Alaska Fire Service spokesman Sam Harrel said. Crews strengthened an initial scratch line around the fire. Aircraft worked the fire until Sunday afternoon, when they were called to two new remote fires in southwest Alaska, the Little Creek and Getnuna Creek fires. 

Elsewhere in the Interior, rain fell on Alaska’s largest fire of the season Sunday. 

Lightning sparked the 2,662-acre Seventy Mile fire May 24, about 10 miles northwest of Eagle. Rain slowed down the fire Sunday, Harrel said.