The Selva are spirits of this forest. Or. That is my understanding. They have magical powers that can influence moods and minds. I believe the fire was a mixed cause. Some of it was caught up in an attack on the Zenith building. Some of it was misguided or possessed volunteers.

[Silas may not be the most knowledgeable person, but he does answer concisely when possible. More than could be said for most of the locals, now that they distrusted the volunteers. Or Zenith themselves, depending on subject...]