Lessons from the Storm: Building Resilient Telecom Networks for Natural Disasters

When Hurricane Ida slammed into Louisiana in August 2021, it caused damage characterized by ripping the roofs off of homes, flooding highways, uprooting trees, and downing power lines. It also tearfully robbed the digital lifeblood of millions of Americans who were totally reliant on it to live their lives.

Let's flip this image and look at it differently - it's fragile, consequential - yes, Netflix is buffering; but your surgeon's robotic arm couldn't afford to blink.

Regionally, it wiped out tons of areas; families had zero assurances; responders had their hands tied searching for updates - if they even existed.

This was more than an atmospheric event; this was our nation's stress test of the limbs of our entire ecosystem of communication. And now it's time for the ask - how do we repair it?

What Happens When the Signal Drops

Natural disasters are not only damaging buildings or flooding streets; disasters disrupt the support systems we rely on to live safely. Disaster support systems include everything from weather alerts to emergency telephone systems, to online payment systems, to connecting with family and friends. Telecommunications networks, of course, are the systems which support all support systems. Experiencing signal failure during an emergency is not just an inconvenience; it is a real life-or-death situation. But cyclones don't knock politely. They tear through towers, flood underground fiber lines, and leave data centers in the dark. And while operators scramble with mobile towers on trucks and boats, sometimes it's not enough - or not soon enough.

After Hurricane Ida made landfall, and in the days afterwards, there were 1,400-plus cell sites down throughout the states of Mississippi, Alabama, and Louisiana, affecting over a million individuals. In some communities, lost service lasted days. With no warning, and with no way to contact families, no way to even call 911, communities were left in the dark and void of educational information in some respects. Lack of communication delays disaster response - but can also isolate individuals and even delay helping people, often with negative outcomes in terms of loss of life.

Thinking Beyond Towers and Wires

In this case, resilience is not about building stronger infrastructure. Resilience is about using smart systems effectively. And that is happening in many places in the U.S. After major hurricanes and wildfires, the U.S. telecommunications industry partnered with the National Weather Service, FEMA, state and local emergency management, and others to understand and assess network risks before there was a risk to any network. There is advantageous and compelling momentum to build communication systems that anticipate the uses and details of a disaster, rather than just establish recovery after one.

Here's the thing: nature doesn't give warnings in comfortable PowerPoint presentations. So telecom systems must rely on dynamic forecasting, redundancy, and ultra-low latency communications that don't fail when the grid does. Planners are now considering backup fuel chains, strategic power routing, and even intelligent network reconfiguration based on weather forecasts. In other words, a living, breathing network that adapts on the fly.

Most individuals do not likely give a second thought to how these changes happen - and that is part of the design. For a typical user in the end, it just means you will not lose a call because rain disrupted your signal, or now you will be able to finish your video while you are in a remote location. Or if a part of the system fails, it's either fixed or rerouted, and you are completely unaware that it even failed. The technology itself is complicated, but the result should be simple: You need something to work, and you can count on it to work.

The Redundancy Revolution

Let's talk about redundancy, an often ignored part of disaster resilience. Redundancy is definitely not pulling the battery out of the box as a backup. Redundancy means that the systems, at any one time, have available and deployed multiple routes, carriers, and technology. As soon as one leg of the system fails, the other leg kicks in - as the understudy would, saying every line perfectly.

A lot of the improvements which contribute to the resilience of a network against disaster are improvements to networks that are simply better in day-to-day situations.

For instance, if you were to develop an electricity network designed to dispatch less coal-fired generation in the event of a network failure, you could design the electricity network to dispatch less coal-fired generation in normal circumstances.

The same reasoning applies to transportation or routing of traffic; the networks can redefine their routing in the event of congestion, redirecting traffic and services to alternate routes instead of obstinately attempting to route along the same path.

There will be consequences in minutes or seconds rather than hours. Calls and data don't become stuck to one another in the event of failure or congestion of one segment of the system.

Maintenance is also evolving; a system operator of a water main can find the first indications of issues before they happen by monitoring system activity or patterns, instead of waiting for breakdowns to occur.

Certainly, there is no such thing as foolproof monitoring technology; there simply is logic in monitoring and evaluating the network long- and short-term to see how analysis and readings indicate changes that may suggest emergent problems.

But reasoning about the robustness of a network to repair and/or departure routes leads to another reliable motive: while the network sometimes has an outage of service due to a breakdown, the eventual time for a segment of road or rail to resume service does not take long, and often people don't even know there was an outage because the service resumed so quickly.

A hopeful development from Hurricane Ida was that the Federal Communications Commission (FCC) assisted certain providers - namely AT&T, Verizon, and T-Mobile - to engage in a connection to develop a partnership and allow for mutual roaming capabilities in the event a secondary carrier suffered some consequence from a primary carrier. Secondly, it shows the possibility to interconnect on a common infrastructure from the FCC's Disaster Information Reporting System, or DIRS.

The 6G Horizon: Seeing What You Can't See

Let's think a little more creatively. Imagine a communication network that is designed to transport messages, but is really monitoring everything around it. With 6G, we are now discussing radar-like sensing as well as the communications aspect. The waves that are transmitting a phone call can not only transmit but detect a drone flying into the neighborhood, or show road traffic patterns, or moving objects within a building. Communication and monitoring then collapse into one, and emergency responders would have real-time data for what to do in ways we never imagined.

This isn't sci-fi. The following illustrates organic approaches to interpreting video waveforms that we have seen in the labs. For example, a structure could detect damage close by, simply based on the backscatter of the signal. A mobile network could detect how many people are present in the building, and if any minors were hiding from safety protocols in the school building, it would be able to react and respond by sending assistance as needed. This technology is more than just smart. That's future-proofing lives.

Ground Realities and Grit

Resilience happens on the ground, despite having useful advanced technology. Literally on the ground. Resilience is during the installation of cables, the height of the tower, and how quickly crews could get in there to clean up post-storm. Hurricane Ida (2021) and Hurricane Katrina's (2005) experiences demonstrate that fuel shortages, compromised access via roadways, and/or remoteness created a very real operational challenge to all wireless telecommunications providers when faced with restoration of service.

Simply put, they could not get access to the tower, and the generator ran out of diesel fuel. While backup systems were installed, either they did not function properly, or it was simply a slow path to return to service due to a supply chain shortage.

Collaborative engagement with power companies, emergency management, and transportation services at a level appropriate to your community is not a choice; it is, by the very nature of the context, a system of survival.

There is no silo restoration, with a chain of command, individuals trained in emergency management, and all at a single-window clearance as an acceptable process or sequence of events that allows people to access the back end of restoration - it takes time to work through.

Such access makes the difference between hours and days - and sometimes, that time means everything.

Don't Just Build Back, Build Smarter

After every cyclone occurs, the rush to recover is immediately on. A better stock response would be to recover with foresight toward the next event. That means, for instance, inserting disaster analytics; addressing last-mile connectivity; enabling network slices dedicated to emergency services; and solving gaps in rural and underserved communities to carry preparedness plans for the next cyclone or disaster event.

In the end, we should want to be ready for the next cyclone and leave reliably resilient.

This is a whole issue nominally related to rural counties, tribal lands, and far coast communities, who are typically the worst served and thus can only be viewed this way: 'the most vulnerable' - they're usually the last to come back online, even though they were first to disconnect after a cyclonic event.

To believe all might have provided operational justification, but this whole matter is related to national security. Cyclones do not credential zip codes, nor should our infrastructure.

A Signal of Hope

The main purpose of reliable telecommunications systems is to connect people - especially when it matters. Fiber, LTE, satellite, or 6G sensing - to put it simply: no voices left unheard, no voices left without communication.

The solution is operationalizing knowledge into infrastructure.