Es un témpano de hielo

[ROBINDESBOIS]

When sb is very cold. ENGLISH?

[poli]

I'm freezing to death.

If you call someone an iceburg (témpano) the meaning is different. It means very cold emotionally. Not very courteous

[ROBINDESBOIS]

I mean when sb has a cold personality. Sorry for the misuanderstanding.
Ella es un tempano de hielo. She is a cold person.

[Rusty]

Describing someone as cold means they're insensitive, inconsiderate, heartless, or callous. It also means not affectionate or unfriendly.

[poli]

I mean when sb has a cold personality. Sorry for the misuanderstanding.
Ella es un tempano de hielo. She is a cold person.
...or an iceburg

[pjt33]

Iceberg, surely? It's a mountain of ice rather than a town of ice.