Credit Valley Conservation has closed all of its conservation areas and trails.
Officials say it is to protect visitor and staff safety.
The closure will take effect at 4 pm Tuesday March 24th, until further notice.
Full closures apply to Belfountain, Island Lake, Terra Cotta, Rattray Marsh, Meadowvale, Limehouse, Silver Creek, Upper Credit Conservation Area and the Cheltenham Badlands.
The closures also include Ken Whillans Resource Management Area, the Elora Cataract Trailway and all other CVC-owned or operated properties and trails.