Lightning strikes from recent monsoon storms have sparked three small wildfires in Grand Canyon National Park.

All three are on the canyon's north rim, and all are currently less than one acre in size. As of Thursday, the biggest one is a half-acre burning a couple of miles from the north rim's entrance.

“They’re being monitored right now, but there are no crews working actively on any of the fires," said Kirby-Lynn Shedlowski with the Grand Canyon National Park. "There's no trail (or road) closures, and there should be no smoke visible from anywhere beyond the immediate area."

The Associated Press reported that two of the fires started Sunday and the third on Monday.

At this time, the park has not issued travel advisories.

Officials said they believe the fires will eventually extinguish themselves.