Megafires: Rare Occurrences or the New Normal?

Over the past few years, the media has given a lot of attention to large wildfires known as "megafires". But are megafires a new phenomenon? In this Data Puzzle, students study the environmental conditions that lead to megafires and analyze a megafire frequency dataset to investigate the question, "How and why has the number of megafires changed over time?" Figure credit: DMCA.