Three Internet Cables Were Cut in the Red Sea This Week. Yours Kept Working. Here Is Why.

This week, three of the internet's busiest undersea arteries went quiet in the same stretch of water. The SEA-ME-WE 4, IMEWE, and FALCON GCX subsea cables were severed near Saudi Arabia in the Red Sea. The outage tracker NetBlocks reported slow speeds and intermittent access across Saudi Arabia, Pakistan, the United Arab Emirates, and India. Microsoft Azure warned customers that network traffic crossing the Middle East might see increased latency. Pakistan Telecommunications told users to expect possible degradation during peak hours.

And yet, if you were sitting in London, Tokyo, or New York, you probably noticed nothing at all. That asymmetry is the real story. The global internet is designed to be wounded constantly and to keep working anyway. Here is how.

A cut is a traffic jam, not a wall

When a subsea cable fails, no one flips a switch on your connection. What happens is quieter and more interesting. Networks detect the lost capacity, withdraw the broken routes, and push traffic onto surviving paths. Data that would have crossed the Red Sea now travels around it, perhaps across the Pacific, perhaps the long way around Africa. The internet still works. It just takes the scenic route.

That rerouting has two costs. The first is latency: every extra thousand miles adds delay, and for video calls or gaming, delay is the product. The second is congestion: the surviving cables suddenly carry everyone else's traffic too, so speeds sag during peak hours. That is why Pakistan's telco warned about peak hours specifically, and why Microsoft framed the impact as increased latency rather than an outage. In the language of networks, a cable cut is a traffic jam, not a wall.

Most cable incidents end this way. Analysts tracking the October 2 Philippines fault, when the C2C link to Singapore went down while its Hong Kong link was under maintenance and PLDT lost roughly 300 gigabits per second of capacity, noted that rerouting, not a seabed fix, is what brought speeds back. The physical repair takes weeks. The internet heals itself in minutes by moving around the damage.

The internet does not survive because its cables are unbreakable. It survives because no single cable is load-bearing.

The chokepoint problem

The Red Sea is one of a handful of places where geography funnels an outsized share of the world's data through a narrow corridor. Analysts estimate the Red Sea corridor carries around 17 percent of global internet traffic, which is why faults there ripple across continents. This is not the first time: in September 2025, the SEA-ME-WE 4 and IMEWE systems were cut near Jeddah, Saudi Arabia, degrading connectivity across South Asia, the Gulf, and parts of Africa. Experts at the time judged those cuts were probably accidental, the work of ship anchors dragging across the seabed in a shallow, congested chokepoint.

The cause of this week's cuts is not yet known. The Red Sea is both a conflict zone and one of the busiest shipping lanes on earth, with more than $1 trillion in goods passing through each year. Houthi rebels have previously been accused of targeting cables, a claim they denied, while anchors remain the likeliest culprit in most incidents. Either way, the effect is identical: capacity vanishes, and the network compensates.

Repair, meanwhile, is slow by design. A specialized cable ship has to locate the fault, lift the cable from the seabed, and splice it, a process that depends on weather, permits, and vessel availability. In the Philippines, the carrier Globe said repairs could take several weeks. Off Western Australia, where the Indigo and Australia Singapore Cable systems have been down since August, repair dates have slipped repeatedly, with targets now around November. One industry analysis estimated the outages removed roughly 100 terabits per second of direct bandwidth out of Western Australia. The internet routes around the wound. The wound itself takes months to close.

The cables do not end at the beach

There is a second, less appreciated vulnerability, and Uruguay demonstrated it on October 13. That day, four separate cuts in the national carrier Antel's terrestrial fibre network, most attributed to road construction contractors, damaged transport routes feeding the country's international links. Antel estimated 180,000 fixed services and 398 mobile base station sites were affected, and reported that the terrestrial cuts restricted access to submarine cables landing at Maldonado, reducing international bandwidth.

The lesson is cross-layer dependency. A subsea cable is only as useful as the land network that carries its traffic inland. Analysts covering the incident put it plainly: terrestrial incidents changed the conditions under which international capacity could be reached. Hardening the seabed means little if roadworks on Route 9 can do the same damage from dry land.

So the giants are building more cables

Perhaps the most telling detail of this week is what happened alongside the cuts. While the Red Sea made headlines, Google announced a burst of new subsea projects: TalayLink, connecting Australia and Thailand; three new Americas systems named Alisios, Canoa, and OlaLuz, linking Chile, Panama, the Dominican Republic, Bermuda, and Florida; and the landing of its Nuvem cable in Sines, Portugal, a roughly 7,000-kilometer system with 16 fiber pairs and 384 terabits per second of capacity, due to enter service later this year. Amazon announced Fastnet, its first solo private transatlantic cable, linking Maryland to County Cork in Ireland with more than 320 terabits per second when operational in 2028, the first cable ever to land in Maryland. Lightstorm, with Microsoft, Singtel, and Tata Communications, unveiled the I-2SEA system connecting India, Malaysia, and Singapore, explicitly aimed at AI workloads.

Notice the pattern. The companies that feel cable failures most acutely, the hyperscalers moving AI training traffic between continents, are the ones buying their own redundancy. They are not waiting for geography to get safer. They are adding so many paths that no single cut matters as much. That is the same logic the internet has always run on, now being built deliberately, one cable at a time.