Wow, that's a bad spot.
The "trail" is not really that, more of a route, and you have to cross water a bunch of times. In this weather, it would be raging, and I recall the signs of high water way, way, WAY above one's head.
Odds are, they are in there someplace, isolated by water, and stuck until the water level really drops. Could be days. If they are prepared, they should be safe.
