Fires

From Lostpedia

Several fires have been noted on the beach in Lost, aside from controlled campfires and signal fires.

1 "...In Translation"
2 "Fire + Water"
3 "The Cost of Living"
4 Miscellaneous

"...In Translation"

In this episode, the raft that Michael has been so painstakingly building is intentionally set on fire by an initially unknown perpetrator. People start to look to one another suspiciously, and Michael quickly accuses Jin of setting it, as it is known that he didn't like him (a misunderstanding over the Rolex watch led to Jin attacking Michael). Sawyer even binds and threatens Jin, believing him to be the raft-burner. Eventually, Sun manages to convince Michael that Jin is not the arsonist. Walt admits to Locke, and later Michael, that he set the fire, because he did not want to leave the island.

"Fire + Water"

The fire that Charlie set.

On Day 53, Charlie wanted to steal Claire's baby Aaron in order to baptise him, because Charlie thought Aaron was in danger. At first, a mysterious figure gathered wood and lit a match. We then saw Charlie walking towards the camp, past Sayid. At the time, the viewer did not know for sure it was Charlie who set the fire.

Sayid spotted it and took control, and ran shouting through the camp: "Fire! Fire! Grab tools, containers for sand, anything you have. If we don't stop it now, it will burn right through the camp." At the scene, he told them "We need to cut the fire break right here. Form a bucket line." Locke, who would normally have been in the Swan, told Claire to stay with the baby, and ordered some people to go down to the water. Sawyer was flapping at the fire, and Jin was seen helping.

Charlie later admitted to Jack that he caused the fire, however Jack said he already knew.

"The Cost of Living"

A mysterious fire starts up in one of the tents, while Charlie is tending to an injured and delirious Eko. It distracts him long enough to look away, and when he and Locke return, Eko is nowhere to be found. It is never revealed how this fire started, although a vision of Yemi appears before Eko in the tent holding a lit Zippo lighter.

Miscellaneous

1x03: "Tabula Rasa" - Ray Mullen's truck caught fire after overturning; Kate was captured by Edward Mars because she stopped to rescue Ray.
2x09: "What Kate Did" - Kate killed her biological father Wayne Janssen with a gas explosion and fire.
3x11: "Enter 77" - When Mikhail is treating Sayid's gunshot wound, Mikhail sterilizes a pair of tweezers with a Green-Flamed Jet or torch lighter (possibly supplied by Dharma).