It’s been another deadly long weekend on Ontario waterways, with three confirmed drownings and two more feared dead.

The deadly weekend started with two brothers being pulled from Lake Ontario near a water filtration plant near Queen Street and Victoria Park Avenue.

They were rushed to hospital and EMS workers tried to revive them, but the two later died in hospital.

It’s reported they had been camping in the area and had decided to go for a swim. Police believe something went wrong and are calling it death by misadventure at this point.

In another death, at Long Point Provincial Park on Lake Erie, a Mississauga man drowned after disappearing under the water while swimming at the main beach.

In the other cases, the search continues for two other people who went missing on the water in Lake Ontario and Lake Scugog.

Durham police are searching for an Ajax man who was canoeing on Lake Ontario near the Whitby-Ajax border. After the canoe capsized, the missing man did not make it back to shore.

Finally, in the Kawartha Lakes area a man is presumed drowned after he dove from a houseboat on Saturday and didn’t resurface. Police searched the waters Saturday and Sunday but have not located a body.

Brian Patterson, from the Ontario Safety League, tells 680News that most drowning deaths are preventable.

He stressed that kids need a life-jacket on when anywhere near the water, while all adults should be wearing one while on a boat.