Noyaki (the burning of the fields) in Aso is usually done with good control but sometimes there are accidents. In the past, people have become trapped in the flames and lost their lives. Today, the flames spread to nearby forests. According to the video report at the following link, it took a couple of hours (helicopter deployment, etc.) to get the fire under control.
https://rkk.jp/news/index.php?id=NS003202102231811180111
Click on the following link to see previous posts about the noyaki practice and how this ancient practice is what gives the Aso area its distinctive appearance.
https://www.facebook.com/page/123734781033296/search/?q=noyaki
– Kirk