A wide swath of low-lying areas along the Grand River watershed are now under a flood warning.

The Grand River Conservation Authority issued the warning Thursday afternoon for select areas along the Grand, Speed and Nith rivers.

The Nith River is expected to reach warning levels through Wolverton on Thursday afternoon, with road closures possible in parts of Oxford County near the river.

The Nith will continue on to peak Thursday and Friday in Ayr.

Residents of Tannery and Stanley streets are advised not to park vehicles in low-lying areas for the next couple of days, as water levels will remain high through the weekend.

The Speed River is expected to peak above warning levels Thursday afternoon and Friday afternoon in Guelph, and may cause flooding in Riverbend Park.

Along the Grand River, water levels will reach warning stage Thursday afternoon in Brantford, prompting a closure of Gilkison Street through Saturday morning.

Roads near the river may also be closed in Brant County, Six Nations and Haldimand County.

West of those areas, water levels have already peaked but are expected to remain high. Bingemans Park in Kitchener, the campground in West Montrose and the boardwalk in Elora will remain underwater until the weekend.

Black Bridge Road in Cambridge remains closed near the Speed River until further notice, as does the low-level bridge over the Conestogo River in St. Jacobs.

“Areas that are already flooded, roads that are already closed are probably going to remain that way and we’ll have high water well into next week,” says Dave Schultz of the GRCA.

The GRCA says there is no risk of basements flooding near the river at this point.