A wildfire is an unplanned fire that burns in a natural area such as a forest, grassland, or prairie. Wildfires are often caused by human activity or a natural phenomenon such as lightning, and they can happen at any time or anywhere. In 50% of wildfires recorded, it is not known how they started.
California wildfires created toxic chromium, research finds – NBC Bay Area
California fights Fairview wildfire near Hemet, faces blackouts during heat wave : NPR
Factcheck: How global warming has increased US wildfires - Carbon Brief
Western wildfires: Climate change-fueled blazes plunge Washington, Oregon and California into crisis - Washington Post
How Canada's wildfires reflect a 'fire-dependent civilization
By the numbers: Unprecedented devastation of California's wildfires
Minnesota wildland firefighters help stop Canada's wildfires, here's one on what she's seen
What started Canada's wildfires and are they under control?, Environment News
How Canada's record wildfires got so bad, so fast
California wildfires disproportionately affect elderly and poor residents, UCI study finds – UCI News