If the internet went down for a day, what’s the worst that could happen?

Robin Layton

Mar 18, 2024 — 9 min read

Life without internet access seems nearly unimaginable, but our day-to-day business would be in jeopardy if the internet went out.

Person touching cellphone at desk with laptop in front of them

A world without internet … In 2024, it almost seems impossible. But what if there was an internet shutdown for a day? What would happen?

Globally, over half of the world has internet access. In the U.S., “as of 2024, approximately 97.1 percent of individuals in the United States accessed the internet, up from nearly 75 percent in 2012,” reported Statista.

The internet has become woven into the fabric of our society. Everything from banks and schools to the military and utility systems relies on the internet in some way, shape or form.

Take a moment to imagine with us: What would happen if the internet went down for a day?

A world without internet

It wasn’t that long ago that we actually did live in a world without the internet. The “internet” in its most basic form as a “network of networks” officially launched on Jan. 1, 1983, but dates back to the mid-1950s. It wasn’t until 1989, when Tim Berners-Lee invented the World Wide Web and launched his first web client and server in 1990, that the internet as we know it started to take form.

Back in 1995, less than 1% (0.77%) of the world was using the internet. Today, 66% of the world’s population uses the internet.

According to a report by Statista, “As of January 2024, there were 5.35 billion internet users worldwide, which amounted to 66.2 percent of the global population.”

The worldwide pandemic forever changed the landscape of internet use, driving millions of people to stay home for work, school and entertainment. We’ve become dependent on internet access for every facet of our lives. 

What would happen if there was an internet shutdown?

About a million Arizonans found the answer to that question in 2015. Around noon on a February weekday, the internet stopped working for folks from Flagstaff to Phoenix. 

A major fiber optic cable feeding several carriers and services was deliberately cut by vandals, stopping internet and telephone services for hundreds of miles. 

During that time, debit and credit cards ceased to work, leading businesses to close or go to all-cash transactions. 

Cellphones were useless, so there was no texting or calling. The cable cut also shut down most landline phone services. 

This put 911 emergency calls into peril. As reported to CBS News, “In Prescott Valley, about 75 miles north of Phoenix, authorities said 911 service was being supplemented with hand-held radios and alternate phone numbers. Yavapai County spokesman Dwight D’Evelyn said 911 lines were limited Wednesday afternoon and authorities couldn’t access law enforcement databases.”

In short, the answer to what would happen if the internet went down was that the lives of Arizonans came to a standstill that day – and that was a few years before the world became even more entwined with the internet during COVID.

On that day without internet in Arizona, businesses relying on that connection for production and tracking simply closed and sent employees home. 

Once at home, unless you had an antenna, there wasn’t cable to watch TV or internet to surf the web. Reading a book while the kids played in the yard was a good option, though. 

Fortunately for retailers, emergency personnel and business owners, the cable was repaired in about six hours.

The global cost of losing internet for a day

If the internet went down for a day all over the world, it’s estimated that the global economy would lose $43 billion that day, with the U.S. getting hit the hardest at $11 billion. 

  • U.S.: $11 billion
  • China: $9.8 billion
  • U.K.: $3.8 billion
  • Japan: $2.7 billion
  • Germany: $1.5 billion
  • India: $1.4 billion
  • South Korea: $1.2 billion
  • France: $870 million
  • Italy: $640 million
  • Canada: $580 million

What would be affected without internet?

Every facet of our daily lives would be changed in some way if the internet simply stopped working:

Key services affected in an internet outage

  • 911 and other emergency services
  • Banking, including credit/debit transactions, cash withdrawals, banking app services, auto bill pay
  • Cellphone and landline service, including all texting and messaging
  • Business/warehouse production and tracking
  • All social media interactions
  • Hospital functions that include admittance, patient portal access, testing, surgery, billing
  • Library services 
  • School services, including online lessons, portal updates
  • Pharmacy interactions like dosage look-up, doctor approvals, script processing
  • Delivery services
  • Medical, dental and veterinary offices
  • Salons with online appointment apps
  • Retail and food establishments rely on online communications for payments and phone calls
  • Transportation, including buses, taxis and ride-sharing services, airlines, shuttles and trains, can be affected by stoppage in ticket sales, scheduling and tracking
  • Gasoline purchases at the pump


With the movement of business practices to cloud-based functionality, the threat of an internet outage becomes even greater. 

“As many as 89% of companies use a multi-cloud approach. While 80% take a hybrid approach, utilizing public and private clouds. Yet, 97% of IT leaders still intend to expand their cloud systems further,” reports ExplodingTopics.com

Big tech companies lose money every minute the internet is not accessible. According to PCMag’s calculations, digital marketplace Amazon is the biggest loser at $1 million every minute there is no internet access. Google is at half a million a minute and Meta $221M. 

Downtimes, even lasting a minute, can weaken an industry. Pingdom.com reports that “in the auto industry, downtime costs rise to about $50,000 per minute, which translates to about $3 million per hour.” Other industry losses include:

  • Media at $90,000 per hour
  • Health care at $636,000 per hour
  • Retail at $1.1 million per hour
  • Telecommunications at $2 million per hour
  • Energy at $2.48 million per hour


Nearly 90% of U.S. adults use online banking, with mobile banking app usage growing every day.

The rise of mobile banking makes sense for consumers: Why waste your lunch break standing in line to deposit a check when you can do it any time of day electronically? But what other parts of the banking industry rely on the internet, and how could they be affected by an internet shutdown?

With the internet down, you wouldn’t be able to use any of your financial apps, so you’d have to show up at the bank to make any transactions — unless you use an online bank, where all banking transactions would be sidelined. Additionally, anything you have set up to pay electronically wouldn’t go through if the internet went down on the day it was scheduled.


Advances in digital technology have revolutionized healthcare. For instance, telemedicine in rural communities means that stroke patients who require tPA treatment (which must be approved by a neurologist and administered within a few hours of symptom onset) can be seen electronically by a neurologist, given medication sooner and have their chances of recovery improved.

Additionally, Electronic Medical Records (EMR) and patient portals — with the ability to message your doctor directly — mean patients are empowered with immediate access to their medical records and care team.

But what if all systems went down?

In May 2019, when the internet went down at Phoenix Children’s Hospital for several hours, it was reported that all “systems were down and patient records were inaccessible.” Luckily, in this case, the outage only lasted a few hours, and no patients were harmed.

But, Dr. Andrew Carroll, medical director and CEO of Atembis in Chandler, AZ, made a very good point to ABC15: “I think just about everything at a hospital is dependent on the internet at this point. You flip the switch, things like your lab work that was done that morning, your radiology studies may not be available, what you did yesterday may not be available.”


While the internet as we know it today didn’t take shape until 30 years ago, the idea for developing a digital communications technology that relied on packet switching dates back to the Cold War of the early 1950s and has the military to thank for pursuing that technology.

Many military operations rely on their own independent networks; however, some electronic communication and data transmissions do take place via the internet. Losing connection for a day would render the military’s use of the internet obsolete and effectively set military operations back 30 or more years and cost the country millions of dollars.

In the Department of Defense Annual Energy Management and Resilience Report (AEMRR) for the Fiscal Year 2020 there were 3,018 unplanned utility outages reported, 649 of which lasted eight hours or longer. The outages were caused by acts of nature like weather, equipment failure or some other event.

From 2018 to 2020, utility outages cost the government about $30.5M, according to the AEMRR.


As countries worldwide upgrade aging utility systems, many are turning to the Internet of Things to help improve processes. For instance, many water treatment facilities now rely on smart sensors and an interconnected system based on the internet.

Aging electrical grids are being upgraded to smart grids, which use digital communication technologies to function more efficiently, such as sending more power to an area that is being overloaded, switching to renewable resources when needed, tracking usage via smart meters, and more.

David Kennedy, a former hacker for the NSA, told Tech Insider, though, that these systems would be particularly vulnerable in the event of a cyber attack.

“There’s been a number of attacks on our infrastructure, originating from both North Korea, Russia, and a number of other countries. Focusing on getting footholds into our grid, so that in the event that there’s a conflict, they can shut our infrastructure down,” he said.

“In a lot of cases, it could shut down a large percentage of our infrastructure. We would be completely blacked out. Wouldn’t be able to leverage any technology, and it would be a complete cataclysmic downfall of a lot of our infrastructure.”


Employers need to look at the bottom line when productivity grounds to a halt from something like an internet outage. Sending employees home might be the best path, but if those employees don’t have paid time off, they may face a lighter paycheck. 

It might be fiscally responsible to close down a factory that relies on automated production that is run online, but some restaurants and shops may stay open, accepting cash-only transactions and modifying their ordering system if it relies on an internet connection. 

How likely is it that the internet will go down?

It’s unlikely that the entire global internet would collectively go down at once for an entire day. The scenarios that would result in a planetary internet outage include an asteroid collision, a massive worldwide cyberattack, a global nuclear war or an overwhelming solar flare.

The internet isn’t just one centralized computer that someone could unplug at any moment. Instead, it’s a massively vast and decentralized network of computers and machines stretching across the planet.

“It would be very, very hard for the entire internet to crash based on an important systems theory principle called redundancy,” Paul Levinson, a professor at Fordham University who has published several books on technology and the digital age, told CIO.

“There are so many backup systems, so many workarounds, so many different ways to get from point A to point B. All these come online instantly and automatically if the system fails.”

Cloudflare outage 

For an example of how a sizeable chunk of the internet can go down, if one of the world’s largest internet networks, Cloudflare, has an issue, it can affect a large portion of the world’s websites, especially e-commerce businesses. 

Cloudflare “acts as a reverse proxy between a website’s visitor and the Cloudflare customer’s hosting provider,” according to Wikipedia,

An outage at the business actually happened in June 2022, when 19 Cloudflare servers went down, affecting sites like Discord, DoorDash, Fitbit, NordVPN and Peloton, according to CNET. Cloudflare explained on its blog that the internet outage was due to “a change to the network configuration.” 

Political-led outages

Across the world, many countries have – or are currently experiencing – political or government-led internet shutdowns, which affect their businesses, education and health systems. 

From January to May 2023, Access Now and the #KeepItOn coalition documented “at least 80 shutdowns across 21 countries … with 18 of these shutdowns ongoing since 2022.” Access Now is a nonprofit with a mission to defend and extend the digital civil rights of people around the world:

Should we reduce our reliance on the internet?

Reducing our use of the internet isn’t really an option at this point. The internet and new technologies stemming from it are now the way of the world. And while there are potential issues with any new technology, there’s a lot of good to be had from using the internet to improve our processes and day-to-day lives.

Robin Layton

Written by:

Robin Layton

Editor, Broadband Content

Robin Layton is an editor for the broadband marketplace Allconnect. She built her internet industry expertise writing and editing for four years on the site, as well as on Allconnect’s sister site MYMOVE.com. … Read more