Who do these burdens fall on for just in case, right?

为了以防万一，这些负担落在谁身上，对吧？

And as he spoke it seemed that the roof fell in, for suddenly vast flames sprang up, rising high into the still night air; and they saw that the house they had just left was blazing furiously.

就在他说话的时候，屋顶似乎塌了下来，因为突然间，巨大的火焰升起，高高地升入寂静的夜空；他们看到他们刚刚离开的房子正在熊熊燃烧。