Wireless Emergency Alerts


Wireless Emergency Alerts, and prior to that as the Personal Localized Alerting Network ), is an alerting network in the United States designed to disseminate emergency alerts to mobile devices such as cell phones and pagers. Organizations are able to disseminate and coordinate emergency alerts and warning messages through WEA and other public systems by means of the Integrated Public Alert and Warning System.

Background

The Federal Communications Commission proposed and adopted the network structure, operational procedures and technical requirements in 2007 and 2008 in response to the Warning, Alert, and Response Network Act passed by Congress in 2006, which allocated $106 million to fund the program. CMAS will allow federal agencies to accept and aggregate alerts from the President of the United States, the National Weather Service and emergency operations centers, and send the alerts to participating wireless providers who will distribute the alerts to their customers with compatible devices via Cell Broadcast, a technology similar to SMS text messages that simultaneously delivers messages to all phones using a cell tower instead of individual recipients.
The government issues three types of alerts through this system:
When the alert is received, a sound is played if the ringer is on. On nearly all devices, the Emergency Alert System radio/TV attention signal sounds in a predetermined pattern.
The system is a collaborative effort among the Federal Emergency Management Agency, the Department of Homeland Security Science and Technology Directorate, the Alliance for Telecommunications Industry Solutions, and the Telecommunications Industry Association,

Participation

Within ten months of FEMA making the government's design specifications for this secure interface for message transfer available, wireless service providers choosing to participate in CMAS must begin development and testing of systems which will allow them to receive alerts from alert originators and distribute them to their customers. Systems must be fully deployed within 28 months of the December 2009 adoption of such standards and are expected to be delivering alert messages to the public by 2012. Although not mandatory, several wireless providers, including T-Mobile, AT&T, Sprint, and Verizon have announced their willingness to participate in the system. Providers who do not wish to participate must notify their customers. Some phones which are not CMAS-capable may require only a software upgrade; while others may need to be replaced entirely.
CMAS messages, although displayed similarly to SMS text messages, are always free and are routed through a separate service which will give them priority over voice and regular text messages in congested areas. Users may disable most CMAS messages; however, CMAS regulations prohibit participating carriers from configuring phones to allow users to opt out of "Presidential" alerts.
Public television stations are also required by the FCC to act as a distribution system for CMAS alerts. Within 18 months of receiving funding from the Department of Commerce, all public television stations must be able to receive CMAS alerts from FEMA and transmit them to participating wireless service providers.
On April 6, 2017, Canada's telecom regulator, the CRTC, ruled that all LTE wireless carriers in Canada must begin relaying public alerts effective April 2018. This system is based on style guides and behaviors dictated by the equivalent Alert Ready system used for radio and television alerting.
In January 2018, FCC chairman Ajit Pai said the commission planned to vote on overhauling wireless alerts, with a goal to make their targeting more granular and specific, citing issues with uses of wider alerts during Hurricane Harvey, and perceptions by users that they are receiving too many alerts that do not necessarily apply to them. The FCC voted in favor of these new rules on January 30, 2018; by November 30, 2019, participating providers must deliver alerts with only a 0.1 mile overspill from their target area, require that devices be able to cache previous alerts for at least 24 hours, and that providers must support a 360-character maximum length and Spanish-language messages by May 2019.
The first national test of a mandatory Presidential alert was held on October 3, 2018 at 2:18 PM EDT as part of a national periodic test of the Emergency Alert System. The message was expected to reach an estimated 75 percent of cell phones. Reasons for not receiving the message included carriers that did not participate in WEA, a phone that was old or otherwise not compatible, or having the phone in airplane mode or off. It is known some did not receive the message, but the exact number has yet to be determined.
The lead-up to the test attracted controversy, due to the false assumption that current president Donald Trump was personally executing the test, and reports suggesting that he could abuse the system to send personal messages similar to those he issues via social media; A lawsuit was filed requesting a temporary restraining order blocking the test, claiming that it violated users' First Amendment rights to be free from "government-compelled listening", the system could allow the dissemination of "arbitrary, biased, irrational and/or content-based messages to hundreds of millions of people", and could frighten children. The suit was thrown out, citing that a Presidential alert can only be used to disseminate legitimate emergency messages. The judge also clarified that the test itself would be conducted and executed by FEMA employees, with no personal involvement from the President.

National Weather Service

The Commercial Mobile Alert System, interface to the Wireless Emergency Alerts service, went live in April 2012. The NWS began delivering its Wireless Emergency Alerts on June 28, 2012.
Warning types sent via CMAS include tornado, flash flood, dust storm, hurricane, typhoon, extreme wind, and tsunami warnings; severe thunderstorm warnings are not included due to their frequency in many areas of the United States. Also, until November 2013, blizzard and ice storm warnings were also included in CMAS; they were discontinued based on customer feedback due to such warnings typically issued well in advance of approaching winter storms, thus not representing an immediate hazard. While blizzard and ice storm warnings are no longer sent to phones by the National Weather Service, some local authorities continue to send winter weather related alerts at their discretion; for example in New York City during the January 2015 North American blizzard, alerts were sent to people's cell phones to warn users of a travel ban on New York City streets.
Beginning Fall 2019, NWS plans to significantly reduce the amount of Flash Flood Warnings that are issued over WEA to only those with a considerable or catastrophic damage threat. It was noted that the NWS over-alerts FFWs over WEA, and the Federal Emergency Management Agency has noted a large number of public complaints about overnight WEAs for FFWs with perceived little impact.
As of July 2020, NWS has announced plans to implement alerts for Severe Thunderstorm Warnings labeled with a “destructive” damage threat, for wind gusts over 80 mph and hail over baseball size.
The Snow Squall Warning is a new type of experimental warning that will begin operation out of 7 NWS offices beginning Mid-January 2018. Unlike Blizzard and Ice Storm Warnings which are issued well in advance, Snow Squall Warnings will be issued when life-threatening snow squalls that will produce strong winds and poor visibilities are occurring. These will be issued as Storm-Based Warning Polygons, like Severe Thunderstorm and Tornado Warnings. This is being considered for the nationwide WEA Program as this event requires immediate action unlike Blizzard or Ice Storm Warnings. In addition to this proposed change, the Dust Storm Warning will be polygon based, and will activate WEA. The zone-based Dust Storm Warning issued in advance will be replaced by the new Blowing Dust Warning, which will not activate WEA. Nationwide Implementation of these new events are scheduled for late 2018.

Versatility

Wireless Emergency Alerts have several ways they can be administered, These have several different uses and severities most commonly are Imminent Threat Alerts, these are for emergency weather conditions primarily or in the case of imminent danger. Other faucets Wireless Emergency alerts include Public Safety Alerts, Amber alerts, and Presidential alerts which recently was used during a countrywide test in 2018. The software impact of the alert is a simple text notification however security concerns still exist for a possible spoof alert. The versatility is limitless in the nature that any kind of alert can be sent; however, the technology is limited until every phone company provides their customers with a way to receive alerts.

Uses and policy

Mobile phones are the most reliable means of relaying the news to the public quickly in case of an emergency. The Department of Homeland Security says what messages are to be sent. They have disclosed that they have phone companies install software connecting your phone to WPA2 servers for possible alerts. The ability in which they do this is changing with new threats we face approaching the future they have special certain alerts for certain areas like in Tornado Alley in the United States.

Notable uses

At the 2019 MobiSys conference in South Korea, researchers from the University of Colorado Boulder demonstrated that it was possible to easily spoof wireless emergency alerts within a confined area, using open source software and commercially available software-defined radios. They recommended that steps be taken to ensure that alerts can be verified as coming from a trusted network, or using Public-key cryptography upon reception.