Why Disaster Communication Matters in the Modern World
The Fragility of Commercial Communication Infrastructure
Modern communication infrastructure is far more fragile than most people assume. Cell towers operate on battery backup systems rated for only a few hours of outage. Commercial internet routers and switching centers require continuous grid power. When a major hurricane or large earthquake strikes, these systems fail simultaneously and at scale. In widespread emergencies, normal communications systems can become unusable or inadequate because of system outages or overcrowding by emergency traffic. The critical limitation of every commercial system — from cellular to broadband to satellite uplinks — is that they depend on infrastructure that sits in the disaster zone itself. Ham radio does not share this weakness. Amateur radio can function completely independently of the internet and phone systems, and an amateur radio station can be set up almost anywhere in minutes — hams can quickly raise a wire antenna in a tree or on a mast, connect it to a radio and power source, and communicate effectively with others.
Historical Examples Where Ham Radio Made the Difference
The historical record of amateur radio in disasters is compelling and well-documented. Amateur radio operators belonging to ARES have responded to local and regional disasters since the 1930s, including the attacks of September 11, 2001, and the category 5 storms Hurricane Katrina, Hurricane Michael, and the Joplin tornado. During Katrina, the scale of ham radio involvement was extraordinary. During the Katrina event, more than one thousand ARES volunteers assisted in the aftermath and provided communications for the American Red Cross, The Salvation Army, and other individuals related to the relief effort. The 2003 North America blackout provided another stark demonstration. ARES deployed for that emergency, a blackout that covered a wide geographical area including Cleveland, Detroit, and New York City — where landline telephones and cell phone systems were overloaded and amateur ability to operate off the grid was put to the test. More recently, in 2017, the Red Cross requested 50 amateur radio operators be dispatched to Puerto Rico to provide communications services in the wake of Hurricane Maria. Amateur radio operators also provided communications in the aftermath of the Boston Marathon bombing when cellphone systems became overloaded.
Why Governments and Emergency Agencies Rely on Amateur Radio
The FCC has authorized emergency management organizations to officially organize and employ radio amateurs to supplement state and local government communications systems during emergencies or disaster operations, and advocates the principle that a fundamental basis and purpose of the Amateur Radio Service is to provide voluntary noncommercial emergency communications to the public. When disasters knock out cell towers, internet service, and commercial power, amateur radio operators often become one of the last independent communications systems still functioning; across North America, ARES and RACES volunteers support shelters, hospitals, emergency operations centers, relief agencies, and local governments using radio systems that can operate completely off-grid.
How Ham Radio Works as a Disaster Communication Backbone
Independence from Commercial Power Grids and Cell Towers
Ham radio's core advantage in emergencies is its radical independence from shared infrastructure. A transceiver powered by a 12-volt LiFePO4 battery or a portable solar panel has zero reliance on the power grid, no connection to the internet, and no dependency on cell towers. Amateur radio operators provide a critical public service by providing reliable communications when the normal infrastructure is offline — when regular communication channels fail such as the Internet or a cell phone network, hams under the direction of ARES are prepared to swing into action, assisting emergency communications efforts and working with public service agencies. This independence is not theoretical. During Hurricane Helene in 2024, massive cell tower failures left entire communities isolated, and amateur radio served as one of the primary communication pathways for both welfare traffic and emergency coordination.
HF, VHF, and UHF Bands Used During Emergencies
Different frequency bands serve different operational roles during disaster communication. VHF (144–148 MHz) and UHF (420–450 MHz) bands are the workhorses of local coordination, providing reliable line-of-sight communication for distances up to 25–50 miles using repeaters or simplex frequencies. Most large-scale emergency communications activity still relies heavily on HF radio because it allows regional and interstate communication without infrastructure. On the HF side, specific frequencies have become institutionally recognized for emergency nets. The Hurricane Watch Net on 14.325 MHz becomes especially active during tropical storms and hurricanes, maintaining direct communications with stations in affected regions. The 40-meter band (7 MHz) provides reliable regional coverage during daylight, while 80 meters (3.5–4 MHz) is preferred for nighttime regional nets and NVIS operation. 14.265 MHz is widely associated with SATERN (Salvation Army Team Emergency Radio Network), which handles health-and-welfare traffic and disaster support communications.
Portable and Battery-Powered Operation in the Field
Field-deployed ham radio stations must be completely self-sustaining. Power is critical in any portable ham radio setup, especially in emergency situations where access to the electrical grid might be unavailable; lithium-iron phosphate batteries are lightweight, have a long lifespan, and offer stable power output — ideal for portable operations. Adding solar panels to recharge the battery when setting up in a remote location for an extended period greatly extends operational endurance. A well-prepared emergency operator can maintain communications for 72 hours or more from a completely grid-independent setup.
Digital Modes and Voice Communication During Disasters
Modern emergency ham radio combines traditional voice operation with powerful digital modes. Digital technology has revolutionized the emergency ham radio landscape, making it possible to send messages, files, and even emails when other systems fail — with tools like Winlink, operators can transmit email over radio waves, and APRS provides real-time location tracking and short text messages, which are invaluable for search and rescue operations. Modern radios also support digital voice modes like DMR, D-STAR, and Fusion, which enhance clarity and reliability in challenging conditions.
ARES and RACES: The Organized Emergency Response Networks
What Is ARES (Amateur Radio Emergency Service)?
The Amateur Radio Emergency Service (ARES) consists of licensed amateurs who have voluntarily registered their qualifications and equipment, with their local ARES leadership, for communications duty in the public service when disaster strikes. In the United States and Canada, ARES is a corps of trained amateur radio operator volunteers organized to assist in public service and emergency communications; it is organized and sponsored by the American Radio Relay League (ARRL) and the Radio Amateurs of Canada (RAC). ARES is structured at the local level by Emergency Coordinators (ECs) who maintain full responsibility for their groups and serve as the primary point of contact. Local ARES groups work with local governments, section ARES groups work with state or county governments, and ARRL works with the federal government. ARES groups regularly support non-government organizations as well. Operators may assist Red Cross shelters, hospitals, community emergency teams, search-and-rescue groups, or local public events.
What Is RACES (Radio Amateur Civil Emergency Service)?
RACES stands for "Radio Amateur Civil Emergency Service," a protocol created by the Federal Emergency Management Agency (FEMA) and the Federal Communications Commission (FCC Part 97, Section 407). Founded in 1952, RACES is a public service provided by a reserve (volunteer) communications unit within government agencies in times of extraordinary need. RACES is a governmental program authorized by Part 97 of the FCC rules, endorsed by the Department of Homeland Security (DHS) and FEMA; any local, county, or state government may organize a RACES group, and RACES may be activated for emergencies including natural disasters, technological disasters, fires, floods, earthquakes, chemical spills, nuclear power plant accidents, and acts of war.
How ARES and RACES Differ and When Each Is Activated
Understanding the operational distinction between ARES and RACES is fundamental to working effectively in either system. ARES is activated before, during and after an emergency and generally handles all emergency messages, including those between government emergency management officials; RACES, on the other hand, almost never starts before an emergency and is active only during the emergency and during the immediate aftermath if government emergency management offices need communications support — RACES is normally shut down shortly after the emergency has cleared. A key regulatory distinction is that ARES operators are bound by all applicable Part 97 rules but aren't bound by the specific emergency rules as specified in §97.407 as RACES stations are, giving ARES operators greater flexibility — RACES stations are limited by Part 97 as to who they can communicate with, which messages they may pass, and how long drills may last. In practice, RACES and ARES licensed operators can hold dual registration in both, and it is encouraged by the ARRL that licensed amateur radio operators be registered as both and that cooperative efforts between RACES and ARES organizations be established and maintained.
How to Join ARES or RACES as a Licensed Ham Operator
Every licensed amateur, regardless of membership in ARRL or any other local or national organization, is eligible to apply for membership in ARES. To join ARES, fill out the ARES Registration form and submit it to your local Emergency Coordinator. You can volunteer for RACES by enrolling with a civil defense organization locally. Many counties and states maintain their own RACES registration process through their Office of Emergency Management. During RACES activation, RACES members are considered unpaid employees of the government and are covered by Workmen's Compensation insurance. The practical starting point for most operators is to contact their local ARRL section, find the Section Emergency Coordinator listing on arrl.org, and reach out to the county-level Emergency Coordinator for their area.
FCC Regulations Governing Emergency Communication
Part 97 Rules That Apply During Declared Emergencies
In the U.S., Part 97 is the section of FCC rules and regulations that pertains to amateur radio and the conduct of amateur radio operators, and it is a part of Title 47 of the Code of Federal Regulations. The rules in Part 97 are designed to provide an amateur radio service having a fundamental purpose that includes recognition and enhancement of the value of the amateur service to the public as a voluntary noncommercial communication service, particularly with respect to providing emergency communications. Subpart E of Part 97 is the most important section for emergency operators. Subpart E supports the service of amateur radio operators in times of disaster by establishing basic standard operating procedures to use in case an emergency should occur, primarily authorizing any use of radio technology for the "immediate safety of human life and immediate protection of property," regardless of all other FCC regulations, when no alternative is available.
Key FCC Emergency Provisions: Sections 97.403 and 97.405
Section 97.403 states that no provision of the Rules prevents the use by an amateur station of any means of radiocommunication at its disposal to provide essential communications in connection with the immediate safety of human life and immediate protection of property when normal communication systems are not available. Section 97.405 states that no provision of the Rules prevents the use by an amateur station in distress of any means at its disposal to attract attention, make known its condition and location, and obtain assistance — and further states that no provision prevents the use by a station in that exceptional circumstance of any means of radiocommunications to assist a station in distress. Additionally, at all times and on all frequencies, each control operator must give priority to stations providing emergency communications, except to stations transmitting communications for training drills and tests in RACES. Emergency operators should understand these are real emergency provisions only. Amateur radio operators may use extraordinary flexibility in true emergencies when life or property is at risk — that authority exists for genuine emergencies only, not convenience.
RACES-Specific Regulations Under Section 97.407
RACES members may transmit only messages related to: impending danger to the public or affecting national defense during emergencies; the immediate safety of individuals, the immediate protection of property, maintenance of law and order, alleviation of human suffering and need; the dissemination of information to the public from a local civil defense organization or other government or relief organization; and communications during RACES drills. Regarding training time, RACES drills and tests can't exceed a total time of one hour per week, though with proper authorization they may be conducted for a period not to exceed 72 hours with such drills occurring no more than twice in a calendar year; there are no specific limits on ARES drills and tests.
Radio Propagation Considerations During Emergencies
Using HF Propagation for Regional and National Coverage
HF radio propagation is the mechanism that makes ham radio irreplaceable in large-scale disasters. Unlike VHF and UHF, which are line-of-sight limited, HF signals refract off the ionosphere and can travel hundreds to thousands of miles with no
