Mediterranean Climate Regions and Fire Risk

Only five regions of the world share a "mediterranean climate," characterized by mild, wet winters and hot, dry summers: the Mediterranean Basin itself, coastal California, central Chile, the Cape region of South Africa, and southwestern and southern Australia. Despite their geographic separation, all five have independently evolved structurally similar, fire-prone shrubland vegetation — chaparral in California, matorral in Chile, maquis and garrigue around the Mediterranean, fynbos in South Africa's Cape Floristic Region, and mallee or kwongan heathland in Australia. The shared climatic rhythm, a long, rainless summer that cures fine fuels while winter rains promote dense shrub growth, produces near-annual conditions favorable to fire somewhere within each region, making these five zones, collectively covering less than five percent of Earth's land surface, disproportionately represented in global wildfire statistics and fire research.