Watch NHK Documentary Season 25 Episode 5 Online

Wildfires can be caused by natural factors such as lightning, but humans also play a large role. In California, which has witnessed some of the most widely publicized examples in recent years, a housing crisis is pushing more people into areas where fires are common. And firefighters are falling victim to PTSD, even suicide. But researchers have found that humans can play a greater role in prevention. Through ancient practices and improved technology, we can reduce the toll of these deadly events.