Crews were back in the White Mountain National Forest on Sunday battling a fire that sparked Saturday morning and scorched 175 acres, according to officials.Two popular hiking trails were closed on Sunday due to the ongoing efforts to extinguish the fires.Forest fires in the White Mountains are not common, according to officials who tell News 9 that having two in one week is very unusual and very concerning.The message they’re relaying to hikers and campers right now is to not build campfires. “It is not yet contained, so today, what we are doing is putting line around it,” said Jim Innes, district ranger with White Mountain National Forest.Approximately 50 firefighters returned to Crawford Notch Sunday for a second day.“At this point we just want to contain it. What happened yesterday was it rained a lot and the lightening caused us to get off the fire,” Innes said. Saturday’s thunderstorms were a big help, according to Innes, but the work is not done. The fire broke out around 10:30 a.m. Saturday.“I knew initially that something was very wrong. You just don't see smoke in that area at all," Harry Lichtman, of Newmarket, said. Lichtman said he couldn't call in the fire with no cellphone service on the trail, but he did take photographs.“There are four patches of smoke and it didn't look right, all near the road that are popular with people and hikers near Arethusa Falls and Frankenstein Cliffs,” Lictman said. The popular trails are closed as of Sunday until the Bemis fire is contained. Officials confirmed crews are battling three separate fires that sparked from the same origin fire. The containment strategy is called laying a line.“When we scratch a fire line that means we are taking away the fuel and we are going right down to the soil,” Innes said. “It's like building a hiking trail around it. So, we want to stop that fire by making a break in the fuel.”Innes said the leaves are wet on top but very dry underneath. He has a message for New Hampshire nature lovers.“Please do not build campfires and if you do, make sure it's out and that means pour water on it,” Innes said.Fire officials said the well-timed rain is critical in gaining the upper hand but cautions that there is a rainfall deficit going into this spring.