WENATCHEE, Wash. -- Fire officials on Wednesday had no estimate on the containment of a brush fire that has scorched 2,600 acres since it started burning the day before.

The fire started around 5 p.m. on Tuesday below the power lines that service the Bonnevillle Power Station at Rocky Reach Dam along the east side of Columbia River.

Officials said the blaze spread quickly overnight but slowed on Wednesday, thanks to two helicopters that dropped buckets of water from above.

About 100 firefighters were battling the blaze Wednesday afternoon. The fire was not threatening any homes.

The cause of the fire is not known.

Meantime, 25 miles north, a second brushfire began burning around 4:45 p.m. on Wednesday near the town of Orondo.

Few details on this 2-alarm blaze were available, but officials said flames appeared to be spreading quickly.

The cause of the fire is not known.

Meantime, a second brushfire began burning around 4:45 p.m. on Wednesday near the town of Orondo.

The 2-alarm blaze is burning 25 miles north of the other wildfire.

Few details on this second fire were available, but officials said flames appeared to be spreading quickly.