The heatwave will no doubt make things a little more uncomfortable for War of 1812 re-enactors in wool uniforms in Wasaga Beach this weekend.
The town is under siege as 300 war re-enactors re-visit battles at Beach Area Two tonight at 7 PM.
There will be two battles on Saturday at 2 PM and 7 PM and another battle at 2 PM on Sunday.
There will also be canon and musket demonstrations as history buffs dress in period costumes and camp out on Nancy Island.
The public can visit the camp starting at 10 AM Friday and on the weekend.
And beachgoers may also witness gun boat battles on the Nottawasaga River at the Main Street bridge.
The Nancy was a supply ship that was destroyed in the Nottawasaga River by US forces.
The sunken hull of the ship caused an obstruction in the river and an island was formed around it.
Wasaga Under Siege runs to Sunday afternoon.