The Oak Springs Fire on the Deschutes River north of Maupin held within lines on Sunday, remaining at 375 acres in size.  The Central Oregon Interagency Dispatch Center says firefighters on Saturday evening and Sunday morning worked to take advantage of favorable conditions knowing hot temperatures Sunday afternoon would bring significant drying of fuels, and those efforts appeared to pay off. The fire is on the west side of the Deschutes River Canyon.  Resources on the fire included rural fire protection resources from Oak Springs, two helicopters, a 20-person hand crew, the Prineville Hotshots, and three engines.  The cause of the fire is currently under investigation.  Fire officials are reminding the public to be aware that given hot weather conditions fuels continue to dry out rapidly, and over the next couple of days the potential for lightning with little moisture makes the possibility of additional fire starts very high.