'Fire' in the Bible

Melted have been the mountains under Him, And the valleys do rend themselves, As wax from the presence of fire, As waters cast down by a slope.

And all her graven images are beaten down, And all her gifts are burnt with fire, And all her idols I make a desolation, For, from the hire of a harlot she gathered, and unto the hire of a harlot they return.