Police are warning boaters to be vigilant while loading their boats after two pickup trucks ended up sliding into the Burlington Bay on the Hamilton side within 24 hours.

The first truck, a 2015 Dodge Ram, slid into the water Friday night at the Bayfront boat launch while its owner was attaching a boat. That truck was completely submerged and will likely be a total write-off, said Const. Ben Rushton of the Hamilton Police Marine Unit.

The second truck, a Ford F150, slid into the water Saturday afternoon around 3 p.m.

Both drivers were unharmed, as they were outside their vehicles loading their boats when the trucks slid into the water.

Rushton said seaweed is likely to blame.

"This year we've noticed an unusually high amount of seaweed," he said. "That combined with algae has made it unusually slippery on the ramp."

The City of Hamilton was called to the scene and has cleaned the ramp. However, the boat launch at Bayfront is closed until further notice. The launch at Fisherman's Pier remains open.