Methane reacts with water (steam) when they are hot enough (over about 700 °C) but I am skeptical of it being explosive. https://9to5science.com/reaction-of-wa

Methane reacts with water (steam) when they are hot enough (over about 700 °C) but I am skeptical of it being explosive. https://9to5science.com/reaction-of-water-and-methane https://9to5science.com/reaction-of-water-and-methane An article linked to by the author mentions a case of rapid disassociation of the hydrate on heating, but the heat was applied to the pipeline externally, and probably at a point such that the disassociation occurred within the body of the plug, as opposed to one of its ends. https://petrowiki.spe.org/Hydrate_plug_removal https://petrowiki.spe.org/Hydrate_plug_removal