Denver testing outdoor sirens, emergency alert system this week

Denver’s outdoor warning sirens will sound for three minutes on Wednesday morning as officials test the city’s emergency ...
wdef.com

An emergency alert test will sound today on all U.S. cellphones, TVs and radios. Here’s what to expect.

UNITED STATES (CBS) — Your electronic devices may alarm you today — but there’s a reason for that. A nationwide test of the federal emergency alert system will be broadcast at approximately 2:20 p.m.
Maui Now

Hawaiʻi’s statewide emergency siren test, May 1

The monthly test of the all-hazard Statewide Outdoor Warning Siren System is scheduled for Friday, May 1, 2026, at 11:45 a.m.