Cyberattack Hits Suisun City: What Happened and Why It Matters

What Happened in Suisun City?

Imagine if someone sneaked into your city’s digital "brain" and messed up the computers that help police, firefighters, and 911 operators talk to each other. That’s basically what happened in Suisun City, California—a community of about 30,000 people, roughly 55 miles north of San Francisco.

On Saturday, the City Council declared a state of emergency after a cyberattack forced officials to shut down the city’s entire information technology network. This wasn’t just a minor glitch—it affected the communication systems for both the fire and police departments, including how 911 calls get routed to the right responders.

Important Point: City officials emphasized there is no imminent threat to the public. All public safety services remain active and operational. The network was shut down on purpose to contain the threat and preserve evidence for a federal investigation.

How Are Emergency Services Working Now?

Even with the city’s own computers down, help is still just a phone call away. Here’s how they’re handling it:

1. 911 calls are being answered – Dispatchers are now taking emergency police and fire calls through the Solano County dispatch center instead of the city’s own system.
2. First responders are on the job – Firefighters and police officers are still responding to emergencies normally.
3. Online city services are paused – Things like paying bills online or accessing city records are temporarily unavailable while cybersecurity experts investigate and work to restore systems.

The Bigger Picture: Attacks on Critical Infrastructure

This attack on Suisun City isn’t happening in isolation. It’s part of a growing trend across the United States where hackers target the computer systems that run essential services.

Recent Attacks on Water Systems

• Federal agencies (FBI, EPA, and CISA) are investigating cyberattacks on municipal water systems in at least a dozen states.
• In Minnesota alone, 30 water systems were hit. Officials saw dramatic drops in water levels before backup systems kicked in.
• At least seven states had their water and wastewater systems remotely accessed by attackers.

Why Water Systems?

Many smaller communities use internet-connected automated systems to control water treatment and distribution. It’s convenient—but if those systems aren’t well protected, they become easy targets.

Who Might Be Behind These Attacks?

Federal officials believe some of these attacks could be affiliated with Iran. Specifically, agencies have warned that Iran-affiliated hackers have been targeting internet-connected industrial controllers—the specialized computers that run physical equipment like pumps, valves, and treatment systems.

Their goal? To cause disruptive effects within the United States.

Key Insight: Going after the communication technology used by public safety agencies (like 911 systems) would be a new frontier for cyberattackers. The Suisun City incident may be one of the first times this has happened at a municipal level.

Why Small Communities Are Especially Vulnerable

Think of it like this: A big city has a whole team of IT security experts. A small town like Suisun City might have one or two people managing all their technology—or sometimes none at all, relying on outside contractors.

• Limited budgets mean less money for cybersecurity tools and training.
• Older systems may not have modern security features.
• Internet-connected controls (for water, traffic lights, 911 routing) create more "doors" for hackers to try to open.

What Are Leaders Doing About It?

Federal Level

A bipartisan group of lawmakers recently urged the restoration of federal funding for Department of Homeland Security (DHS) programs that coordinate cybersecurity efforts across multiple states. These programs help share threat intelligence and provide technical support.

State Level (California)

Governor Gavin Newsom’s office stated:

• There’s no evidence California water systems were targeted in the recent wave of attacks.
• However, state-by-state efforts are less effective than a coordinated federal response.

Quote from the Governor’s Office:
"Cyber threats do not stop at state lines, and no state can defend against them alone. Federal cuts to the nation’s cybersecurity workforce and critical programs have weakened the partnerships, threat intelligence and technical support that help protect essential services across the country. Reducing these capabilities while cyber threats continue to grow leaves every state, and the nation, less prepared for the next attack."

Important Points to Remember

• Suisun City declared a state of emergency after a cyberattack shut down its IT network.
• 911 and emergency services still work—they’re being routed through Solano County.
• No immediate danger to the public—safety services remain active.
• This is part of a national pattern—water systems and public safety agencies in multiple states have been targeted.
• Iran-affiliated hackers are suspected in some of these attacks on critical infrastructure.
• Small communities are especially at risk due to limited cybersecurity resources.
• Leaders say a coordinated federal response is essential—cyber threats don’t respect state borders.

Summary

A cyberattack forced Suisun City, California, to declare a state of emergency and shut down its computer network. While 911 and emergency services continue operating through a county backup system, the incident highlights a growing national threat: hackers—possibly linked to Iran—are targeting the digital systems that control water supplies, emergency communications, and other critical infrastructure. Small communities with limited IT resources are particularly vulnerable. Lawmakers and state leaders are calling for restored federal funding and better coordination to defend against these borderless cyber threats.

FAQ

What exactly is a cyberattack?

A cyberattack is when someone deliberately tries to break into, damage, or disrupt computer systems, networks, or devices. Think of it like a digital break-in—instead of picking a lock, they use code and tricks to get where they shouldn’t be.

Is my 911 service still working if I live in Suisun City?

Yes. The city has switched to the Solano County dispatch center to handle all emergency calls. If you call 911, you will still reach a dispatcher who can send help.

Why would hackers target a small city’s water system or 911 network?

These systems often use older technology connected to the internet without strong security. Hackers—especially those backed by foreign governments—may target them to cause chaos, test capabilities, or send a political message. Disrupting water or emergency services creates fear and instability.

Can my city do anything to prevent this?

Yes, but it takes money and expertise. Cities can:

• Keep software updated
• Use strong passwords and multi-factor authentication
• Segment networks (so a breach in one area doesn’t spread)
• Train staff to spot phishing emails
• Join state/federal cybersecurity information-sharing programs

What should I do as a resident?

• Stay informed through official city channels (not social media rumors).
• Call 911 for emergencies—it works.
• Be patient with online city services while systems are restored.
• Support local investment in cybersecurity—it’s like funding a digital fire department.