Three under one name, quick three times,

Once heralded as prime, I am still the first,

I am deadly, and like no other,

Is it warm in here? Am I making you mad?

What am I?

Three under one name, quick three times,

Once heralded as prime, I am still the first,

I am deadly, and like no other,

Is it warm in here? Am I making you mad?

What am I?

Hint:

One is the smallest, one wears a funny hat, one can predict the weather