How to set structures on fire in Fortnite
There are multiple ways to set structures on fire in Fortnite, such as firing an arrow using the Flame Bow or exploding a gas can near a wooden structure, but the easiest way to throw bottled fireflies on a wooden building.
The best place to find fireflies is by far the Weeping Wood, with little clusters of these surprisingly dangerous insects dotted about the woods. If you re having trouble finding some fireflies, try exploring the wood at night when the fireflies will have an orange glow.
Fireflies are easier to see during the night.