Floodwaters may force some D.C.-area parks to close this weekend, according to the National Park Service, which is warning visitors to check park Web sites for the latest information.

Though Saturday’s skies have been mostly clear, the region’s rivers are continuing to rise in the aftermath of record-breaking rain Thursday night and Friday morning.

The National Weather Service has issued a coastal flood warning for much of the Washington area until 6 a.m. Monday morning, with water levels expected to peak around high tide late Saturday evening.

Among the areas already closed are the tip of Hains Point as well as some boat ramps along the Chesapeake and Ohio Canal and the popular Billy Goat Trail along the Potomac River. Some trails at the Monocacy National Battlefield are also closed.

Paths near the Shenandoah River in Harpers Ferry National Historical Park have been inundated with river water, according to a photograph that park officials posted on Twitter on Saturday morning. The park remains open but has discontinued shuttle buses because of the flooding.

Employees at restaurants along the Georgetown waterfront said that flood walls have been raised and the river is running high but that there have been no problems there.