It’s 11 a.m. on a Wednesday and sirens are going off everywhere in the Mile High City.

No worries, that’s just Denver’s Office of Emergency Management (OEM) performing its annual live test of its 86 all-hazard outdoor sirens, which it plans to sound off at 11 a.m. Wednesday.

The sirens will last three minutes, OEM officials said.

The test will also gauge what officials are calling “new remote activation technology,” according to a statement from OEM officials.

The new system tracks various kind of immediate emergency situations, according to the OEM.

The OEM oversees 75 sirens within Denver, including 11 sirens at Denver International Airport. Normally, the sirens are activated during severe weather or other hazard situations requiring immediate protection.

Sirens are designed to alert people who are outdoors, so they can find a safe place to shelter during emergencies, OEM officials said.

In a statement, OEM Executive Director Matthew Mueller said they are testing new remote technology for the purpose of emergency response innovation.

“Denver OEM is dedicated to implementing innovative solutions to enhance efficiency and safety,” he said. “We are excited to test this new technology, which will enable us to activate the sirens remotely and efficiently in the event of a major emergency.”