On Monday, the fire department did a monthly test of the siren system.

A tornado siren went off in Trafalgar late Tuesday night, but there is no definitive answer as to why or who owns it.

DENVER ( KDVR) — Outdoor emergency sirens will soon go off once a month, year-round, for testing around Boulder County.

You may hear tornado sirens go off in Iowa today. Here's what to know about the Iowa statewide tornado drill and severe ...