The Potomac River and the Shenandoah River at Millville, W.Va., are hazardous and shouldn't be used for recreational purposes, according to an advisory issued Friday by the Maryland Natural Resources Police.
The advisory, prompted by high river levels due to recent rains, is in effect at least through Monday.
State officials said the threat of hypothermia and treacherous currents on the rivers and adjacent streams could be life-threatening for boaters or wading fishermen.
They said the warning does not apply to professionally guided river trips or teams of experienced white water paddlers.
For up-to-date information on Potomac River conditions, call the National Weather Service at 1-703-260-0305.