Lightning: This is the most common cause of wildfires. Lightning strikes can heat the air to very high temperatures, which can ignite dry vegetation.
Volcanic eruptions:  When volcanoes erupt, they release a lot of steam into the atmosphere. This steam condenses and contributes to the water cycle.  It's important to note that this water wasn't necessarily "created" by the volcano, but rather released from the earth's interior where it might have been trapped for a long time.
Earth's rotation: The Earth's rotation further influences wind patterns. As the Earth spins, this moving air gets deflected due to the Coriolis effect, which creates prevailing winds like trade winds and westerlies.