Complex sentence: The Thomas Fire has destroyed at least 790 structures, while damaging 191 others; by December 10, the Thomas Fire had cost at least $34 million dollars to fight, and is currently estimated as the 13th most destructive wildfire in California history.
Split into simpler sentences: The Thomas Fire has destroyed at least 790 structures, while damaging 191 others. By December 10, the Thomas Fire had cost at least $34 million dollars to fight, and is currently estimated as the 13th most destructive wildfire in California history.