Laptop overheating causing frame drops in Fortnite
Solution 1:
The simple fix is you stop playing until the laptop cools down.
If you want to keep playing, you can try a laptop cooling pad. However, the nature of a laptop is that they do not handle extended intense use very well.
I own a gaming laptop and the thing has heatsink and vents all around the base. Even with this setup, the laptop can get hot enough that I can feel it through the keyboard.
Of course, this means that the heat is actually coming out of the machine and lets it run at a sustained level, so I'm glad I can feel the heat.