The City of Saskatoon is warning people about the already fast-flowing South Saskatchewan River, which is expected to reach peak flows by Sunday.

Saskatoon Fire and Protective Services Chief Brian Bentley says flow levels are about three times the average right now - 1,060 cubic meters per second - and is expected to reach 1,460 cubic meters per second by Sunday.

"The amount and volume of water that's actually flowing through the city is extremely dangerous. There's a lot of debris floating that may be on the surface or underneath," notes Bentley.

That means all public boat launches will be closed starting Wednesday.

Bentley adds they'll also be keeping a close eye on walking paths and observation decks in low-lying areas.

"We are going to ask the city to also put up some signage where the areas are blocked off."

Edited by News Talk Radio's Sabeen Ahmad.