LNG quickly becomes a gas when leaked -- you won't see dramatic environmental disasters like with crude oil.

It's also not flammable or explosive in its liquid form, so I suspect you won't see a dramatic explosive failure either.

Of course, it could start leaking and burn when mixed with enough air, but I can't help but wonder how sustainable a fire that would be: The air/fuel mix would not be controlled at all, and would probably quickly burn and stop.

Try googling "lng explosion". It is cold, so is denser than air and spreads out on the surface, and when ignited goes off with a big bang.