This is an irregular verb. It follows the conjugation pattern of the verb agir.
This verb is mainly used in formal contexts and often appears in impersonal constructions.
Present:
Urge resolver este problema.
It is urgent to solve this problem.
Imperfect:
Urgia agir rapidamente.
It was urgent to act quickly.
Conditional:
Urgiria mudar essa situação.
It would be urgent to change that situation.