Late last night when we were all in bed,
Mrs. O'Leary left her lantern in the shed.
Well, the cow kicked it over, and this is what they said:
"There'll be a hot time in the old town tonight!"

When you hear those bells go ding-a-ling,
All join 'round and sweetly you must sing.
And when the verse is through, in the chorus all join in:
"There'll be a hot time in the old town tonight!"

For dramatic effect, shout out "FIRE, FIRE, FIRE" at the end of the first verse.

Silly variant:

Ten nights dark when bed we all were in,
Old Leary lady hung the shed her lantern in,
And when the kick cowed it over, she eyed her wink and said
"There'll be town hot in the time old tonight!"