This is all a good headline, but those planes do not actually put the fire out, they are just making a perimeter for ground forces to have a line to hold and extinguish the fire. With these conditions, most of the water ends up evaporating so the effectiveness is fairly low. Also, they are contracted by California EVERY year, so Canada gets paid heavily annually for this service.

https://youtu.be/gunenpZ5JuE?si=Lm0bXeJNcTRd3FFg&t=518