Fire and water are opposites, right? That may be the case most of the time, but superhot steam actually has enough energy potential to light off a match.
Usually, water quenches fire by rapidly removing the heat of the flames. In other words, water puts out fire because it has a high heat potential. However, when you heat up water to the point that it has no more thermal conductivity in regards to a flame, you can remove its ability to quench fires. Check out how this works in more detail in the video below.