The Emergency Alert System is the federal warning network that lets the President and other authorized officials interrupt radio, television, cable, and satellite programming within ten minutes to deliver an emergency message to the entire country or a specific region.1FEMA. Emergency Alert System A companion system, Wireless Emergency Alerts, pushes short warnings directly to cell phones. Three federal agencies share responsibility for the network, and federal rules dictate which media companies must carry alerts, how often the equipment is tested, and what happens when someone uses the alert tones outside a real emergency.
The Three Agencies Behind the Alerts
FEMA runs the technology. Its Integrated Public Alert and Warning System, or IPAWS, is the digital hub that routes messages from authorized officials to broadcasters, cable systems, and wireless carriers.2FEMA.gov. Integrated Public Alert and Warning System IPAWS uses a standard digital format called the Common Alerting Protocol, which lets a single message flow at once across TV, radio, cable, satellite, and cell networks.3FEMA.gov. Common Alerting Protocol Since 2012, every participating station has been required to receive and distribute alerts in that format.
The Federal Communications Commission writes and enforces the rules. Part 11 of Title 47 of the Code of Federal Regulations tells stations what equipment they must install, how often to test it, and what counts as a violation.4eCFR. 47 CFR Part 11 – Emergency Alert System
The National Weather Service originates most of the alerts you actually see, because severe weather triggers far more emergencies than any other category.5Federal Communications Commission. The Emergency Alert System State, local, tribal, and territorial authorities send alerts too, but the weather service is the most frequent source.
Which Companies Have to Carry Alerts
Federal rules define a specific group of media providers as EAS Participants who are legally required to maintain alert equipment. Under 47 C.F.R. ยง 11.11, that list covers AM, FM, and low-power FM radio (analog and digital); television broadcast stations, including Class A and low-power TV; analog and digital cable systems; wireline video systems; wireless cable systems; direct broadcast satellite providers; and satellite digital audio radio services.6eCFR. 47 CFR 11.11 – EAS Participants Every one of these providers must be able to interrupt normal programming to deliver an alert at any hour.
Streaming services are the notable gap. Netflix, Hulu, YouTube TV, and other internet-based video platforms are not classified as EAS Participants. The FCC opened an inquiry in 2021 and adopted a new rulemaking proposal in August 2025 to re-examine the question, but no final rule exists yet.7Federal Communications Commission. FCC Seeks Comment on the Delivery of EAS Alerts through the Internet If a tornado warning goes out while you’re watching a streaming app, your neighbor with cable will see the alert immediately and you may not.
National, State, and Local Alerts
Not every alert has the same weight. The system runs on a tiered structure: some messages are mandatory, others are optional.
Presidential and National Alerts
Presidential alerts, coded as Emergency Action Notifications, sit at the top. Every EAS Participant is legally required to broadcast them, along with Nationwide Tests and Required Monthly Tests, when the location codes match their coverage area.8eCFR. 47 CFR 11.51 – EAS Operation During a National Level Emergency Station personnel cannot override, delay, or ignore a national alert. The Emergency Action Notification code has never been used for an actual emergency, though the system has been tested nationally, most recently on October 4, 2023.9Federal Communications Commission. EAS Test Reporting System
State and Local Alerts
Below the national tier are state and local alerts: tornado warnings, flash flood warnings, AMBER alerts for missing children, and Blue Alerts for threats against law enforcement. Stations can choose whether to carry these, and most do as a public service.8eCFR. 47 CFR 11.51 – EAS Operation During a National Level Emergency Standardized event codes built into EAS equipment let stations pre-select which categories they relay automatically and which they handle manually.10eCFR. 47 CFR 11.31 – EAS Protocol When a national alert and a local one arrive at the same time, the national message wins. The equipment sorts that out on its own using the header codes.
Alerts on Your Phone
The alerts most people actually see arrive on their phones. Wireless Emergency Alerts, or WEA, are the loud buzzing notifications you get during severe weather, AMBER alerts, and other emergencies. Each WEA message is capped at 360 characters and arrives even without a cellular data connection because it travels on a separate broadcast channel built into the network.11FEMA. Wireless Emergency Alerts
Congress created WEA through the Warning, Alert, and Response Network (WARN) Act in 2006. Wireless carrier participation is technically voluntary. Each carrier files an election with the FCC stating whether it will transmit alerts, and a carrier that opts out must clearly tell consumers at the point of sale and notify existing subscribers.12Office of the Law Revision Counsel. 47 USC 1201 – Federal Communications Commission Duties In practice, every major U.S. carrier participates, and none may charge a separate fee for WEA.
You can turn off most WEA categories in your phone’s settings. Presidential and FEMA alerts are the exception. Congress wrote that restriction directly into the statute, so those categories stay on no matter what.13Federal Communications Commission. Wireless Emergency Alerts
By June 12, 2028, wireless providers must also support WEA messages in 13 languages beyond English, including Spanish, Chinese, Arabic, Korean, Tagalog, and Vietnamese, along with American Sign Language delivered through pre-scripted video templates.14Federal Communications Commission. Multilingual Wireless Emergency Alerts
The Tests You Hear Every Month
Every EAS Participant must install encoders, decoders, and attention signal equipment that stays operational whenever the station is broadcasting.15eCFR. 47 CFR 11.35 – Equipment Operational Readiness The FCC uses a testing schedule to catch problems before a real emergency does.
Required Monthly Tests carry the full package: header codes, the distinctive attention signal, a test script, and the end-of-message code. They alternate between daytime slots in odd-numbered months (8:30 a.m. to sunset) and nighttime slots in even-numbered months (sunset to 8:30 a.m.), with timing and scripts coordinated by State Emergency Communications Committees. Each participant must retransmit the monthly test within 60 minutes of receiving it.16eCFR. 47 CFR 11.61 – Tests of EAS Procedures
Required Weekly Tests are shorter: just the header codes and end-of-message code, no attention signal, no audio. Broadcast stations run them at random days and times. Cable systems with 5,000 or more subscribers per headend must test on all programmed channels; smaller systems only need to test on one. DBS providers, SDARS providers, and low-power stations don’t have to transmit the weekly test but must log that they received it. When a monthly test runs in a given week, the weekly test is skipped.16eCFR. 47 CFR 11.61 – Tests of EAS Procedures
Penalties for Misusing EAS Tones
The distinctive EAS tones exist to make people stop what they’re doing. Using those sounds outside an actual emergency or authorized test is illegal. Section 11.45 bars anyone from transmitting or causing the transmission of EAS codes, the attention signal, or any recording or simulation of them, except during a genuine emergency, an authorized test, or specific narrow exceptions.17eCFR. 47 CFR 11.45 – Prohibition of False or Deceptive EAS Transmissions The ban covers sounds that are “substantially similar” to actual tones, so a near-identical version doesn’t dodge the rule.18Federal Communications Commission. Misuse of the Emergency Alert System Sound
The FCC’s base forfeiture for a tone violation starts at $8,000, and penalties climb from there based on reach and repetition. The statutory maximum for a single violation is $612,395.19Federal Communications Commission. FCC Proposed Forfeiture Order The commission has proposed fines of $20,000 against ESPN and Beasley Broadcasting for individual incidents, $504,000 against FOX Corporation, and reached a $1,000,000 consent decree with iHeart Media after its Bobby Bones syndicated radio show repeatedly used EAS tones outside an emergency.18Federal Communications Commission. Misuse of the Emergency Alert System Sound
When a station accidentally transmits a false alert, it must email the FCC Operations Center within 24 hours to report the incident.17eCFR. 47 CFR 11.45 – Prohibition of False or Deceptive EAS Transmissions Failing to self-report compounds the problem and gives the commission less reason to be lenient.