The American River looked very different Tuesday - higher and faster than the days prior - because of increased flows from the Folsom and Nimbus dams.
Some along the river think the sudden, higher, faster combination could be trouble.
"The water is moving faster, there are drop offs, the bottom of that river is not even," angler Rich Dyba said. "Unless you really know the area and you know where you can wade, it can be real dangerous real quick."
The Bureau of Reclamation says the releases, which haven't seen this level since 2012, are necessary.
"Right now, we are releasing 7,000 cubic feet per second of water down the lower American River. That's about twice what we were releasing about this time yesterday," bureau spokesperson Shane Hunt said.
Hunt said Folsom Lake could start to flood after one big storm if water wasn't being released. He adds that recreators should be a little more cautious around the river, at least until Wednesday afternoon.