When Hurricane Milton hit Florida in October 2024, PowerOutage.us tracked 3.4 million customers losing power at the same time. Restaurants in the Tampa Bay area had to decide what to do about refrigerated inventory worth thousands of dollars. Those without a plan risked losing more once the lights, POS systems, and HVAC went out.
That single storm outage event generated 1.8 million site requests per hour on PowerOutage.us at landfall, showing how many business owners were scrambling for real-time data. Unfortunately, the window to prepare had already closed.
PowerOutage.us has monitored 950+ utilities serving 200+ million customers across the U.S. since 2016. Overall, businesses with a plan recover faster and lose less. Let’s cover what to do.
Building a business power outage plan
A business power outage plan lets your team know exactly what to do instead of making up their own procedures. This is important because every minute of confusion during an outage costs revenue and increases risk.
Your plan needs to cover five areas before an outage ever happens:
- Critical equipment inventory: List every device that needs power to operate, including POS systems, refrigeration units, HVAC, security cameras, and network routers
- Employee roles: Assign one person to shut down equipment, one to communicate with customers, and one to contact your utility provider
- Communication tree: Decide how you'll reach employees, vendors, and customers when cell towers are congested
- Backup power thresholds: Define which systems get generator/battery backup power first and which can wait
- Recovery checklist: Document the steps to restart operations safely once power returns
FEMA recommends small businesses test their emergency plans at least once per year. After each test, gather feedback from staff and update the document. A plan that sits in a drawer and never gets reviewed fails the first time it's needed.
Many small businesses confuse an emergency response plan with a business continuity plan. They're different. An emergency response plan covers the first hours of an outage (shutting down equipment, protecting inventory, notifying staff). A business continuity plan covers how you keep serving customers and paying bills during a multi-day disruption. Both types of plans are necessary.
Also, be aware that the U.S. Small Business Administration (SBA) offers free disaster preparedness resources specifically for small business owners, including template continuity plans and guidance on disaster loans. Most business owners don't think about downloading these until after a loss. The SBA's business resilience resources at sba.gov are worth reviewing now, before a storm season starts.
Backup power options for small businesses
Backup generators and battery systems protect small businesses from revenue loss during outages. The right choice depends on your load requirements, fuel access, and budget.
The three main backup power options for small businesses are:
- Standby generators: Permanently installed units that start automatically when grid power fails. These run on natural gas or propane and can power an entire facility. Cost ranges from $5,000 to $50,000 or more depending on capacity.
- Portable generators: Less expensive ($500 to $5,000) and flexible, but require manual setup. They can't power a whole building. Good for keeping one refrigeration unit or a point-of-sale station running.
- Battery backup systems (UPS and commercial battery banks): Silent, turns on near instantly, and safe to use indoors. A commercial-grade battery backup can keep servers, POS systems, and network equipment running for several hours. They don't produce carbon monoxide, which makes them safer for indoor retail environments. UPS systems switch over in a handful of milliseconds, while larger systems like Tesla Powerwall switch in about 20 milliseconds to one or two full seconds.
Generator vs. battery details
Standby generators solve the problem of a sudden multi-hour outage, but they depend on fuel supply. If you have enough saved up, that’s fine, but pumps can run out of fuel or stop working during an outage.
For example, during Hurricane Beryl in July 2024, 2.6 million Texas customers lost power in 95°F+ heat. Houston-area businesses with generators discovered fuel stations were running dry within 24 hours.
Besides generators, battery backup systems work best for protecting electronics during short outages (under 4 hours) and for bridging the gap until a generator starts. Combining a UPS with a standby generator gives businesses both instant protection and extended runtime. There are backup systems like the Powerwall and modular Genarac batteries that can extend power to a day or more depending on your use. These could be enough for you to close up shop during the remainder of the day and wait out the blackout.
Restaurant power outage considerations
Restaurants face a unique set of risks during power outages: food safety liability, refrigeration failure, lost POS revenue, and regulatory consequences. Planning for these requires more than a generic backup power setup.
Food safety is the most time-sensitive issue. The FDA recommends these thresholds for deciding what to keep or discard:
- Refrigerators: Keep food safe for up to 4 hours if you keep the door closed
- Freezers: Food stays safe for 24 to 48 hours (depending on how full the freezer is) if the door stays shut
- Meat, poultry, seafood, and dairy: Discard if the temperature has exceeded 40°F for more than 2 hours
- Casseroles, pasta, custards, and soft cheeses: Discard after 2 hours above 40°F
Restaurant owners who serve food that crosses that threshold face health code violations and potential liability. During Hurricane Francine in September 2024, 390,000+ Louisiana customers lost power. Restaurants without backup refrigeration faced the choice of discarding inventory worth thousands or risking a health inspection failure.
Prioritize backup refrigeration
Restaurants should prioritize refrigeration units on their generator load. A commercial refrigeration unit typically draws 1,500 to 2,500 watts, and a walk-in cooler may draw 3,000 to 5,000 watts at startup. Size your generator to handle compressor startup loads (not just running loads) or you'll trip breakers.
Have a plan to take cash
Point-of-sale systems stop working without power (obviously), so cash is still king during an outage. Keep a manual transaction log, a cash box with small bills, and a handheld credit card imprinter as backup. Some restaurants also use a cellular hotspot paired with a battery-backed tablet POS to process cards off-grid for several hours. Mobile battery-powered payment systems like Square may still function depending on the scale of the outage (if you have a hotspot to connect it to).
Restaurant food spoilage coverage
Restaurant power outage insurance is a legitimate product that many small food businesses overlook. Commercial property policies often don't cover spoiled inventory by default. 'Food contamination' or 'utility interruption' endorsements can add that coverage. Review your policy before hurricane or storm season.
Protecting data and equipment during an outage
Business data and equipment could be damaged from both immediate power surges and unplanned shutdowns.
Power surges happen when power is restored, not just when it fails. A sudden voltage spike can destroy computers, POS systems, and networking hardware. Every piece of business equipment should connect through a quality surge protector. Surge protectors rated for commercial use (UL 1449 certified) provide better protection than household units.
Data protection during an outage requires these steps:
- Purposeful shutdown: When power fails, use your UPS runtime to properly shut down servers and workstations before the battery runs out.
- Cloud backup: Make sure all critical business data syncs to a cloud service at least daily. This protects you if the equipment is physically damaged during the outage.
- POS transaction records: Export or print daily transaction summaries before closing each night.
- Security camera footage: Many systems overwrite continuously. If a storm is forecast, download recent footage before the outage begins.
An example is when Winter Storm Uri in February 2021 knocked out power to 4.4 million Texas customers. ERCOT (Texas's grid operator) came within minutes of total collapse. Businesses that hadn't saved data locally or in the cloud before the storm lost transaction records, inventory counts, and payroll data when systems shut down.
Your UPS (uninterruptible power supply) is your bridge. A commercial UPS gives you 10 to 30 minutes of runtime, depending on load. Use that time to save files, close software properly, and shut everything down cleanly. Don't try to keep working through the battery. The goal is a safe shutdown.
Plan an emergency kit on site
Keep a power outage emergency kit in your back office because you'll need supplies within minutes of losing power. Stock it with a flashlight, extra batteries, a battery-powered radio, bottled water, non-perishable snacks, first aid supplies, and a hand-crank phone charger. Include paper transaction forms and a printed contact list since you won't have access to your computer.
Employees with powered medical devices need special consideration. If any staff member uses devices at work and relies on charging them during the day, include their needs in your emergency plan. Our medical power outage checklist guide covers how to prepare for medical device power needs during extended outages.
Employee safety and communication during outages
Employee safety during an outage depends on having clear roles assigned before the emergency starts. Without a plan, people can make the wrong decisions under stress and cause more problems.
Post written procedures in the break room, back office, and near the main electrical panel. Cover scenarios like:
- Power goes out during business hours: Who checks on customers? Who contacts the manager on duty?
- Power goes out overnight (unattended building): Who is on the emergency call list? Who contacts the alarm company?
- Power is out for more than 4 hours: Who makes the call to close or stay open? What's the customer communication plan?
- Generator safety: Who is authorized to start the generator? Where is it located, and what's the proper startup procedure?
Generator safety
Carbon monoxide poisoning from generators running indoors or near open windows causes multiple deaths after every major storm. Never operate a generator inside a building, garage, or close to any window or door. The CDC recommends keeping a distance of 20 feet, while the CPSC recommends 25 feet.
Communication tips
Communication becomes harder during major outages as cell towers are overwhelmed and can even go offline in longer blackouts. During Hurricane Helene, for example, 4.79 million Southeast customers lost power simultaneously. Cell service degraded within hours as towers lost backup power. To plan for this, use a battery-powered two-way radio, establish a physical meeting point, and build a contact tree so employees call their immediate supervisor first.
Power outage events that affected small businesses
Real outage events show what small businesses actually face when the grid fails. PowerOutage.us has tracked every major event since 2016 with customer outage counts and duration data directly from utilities.
During Hurricane Milton (October 2024), PowerOutage.us tracked 3.4 million Florida customers losing power. Restaurants in the Tampa and Orlando metro areas faced cycling outages, meaning power returned briefly before failing again. Businesses that powered back up and restarted refrigeration during a 30-minute uptime window, only to lose power again, might have had compressor damage from repeated starts. PowerOutage.us hit 1.8 million site requests per hour at landfall, showing how desperately business owners needed real-time restoration information.
https://twitter.com/PowerOutage_us/status/1846978566892015987
The Houston Derecho in May 2024 knocked out power to 900,000+ Houston metro customers with winds up to 100 mph. Fifty thousand customers remained without power six days later. Houston-area small businesses with generators made it through. Those without could have dealt with $5,000 or more in spoiled inventory and lost revenue per day of closure.
Hurricane Helene (September 2024) hit 4.79 million Southeast customers. Western North Carolina businesses went without power for 14 days in the hardest-hit areas. Small businesses that relied on a single tank of generator fuel were out of options by the third day.
How to recover after a power outage
Take your time to bring business systems back online after an outage to avoid possible equipment damage from power surges.
Step 1
Wait 2 to 3 minutes before powering on equipment. Voltage can be unstable immediately after restoration.
Step 2
Check refrigeration temperatures before assuming food is safe. Use a food thermometer to verify temperatures.
Step 3
Restart equipment in stages. Don't power on everything at once. Start with refrigeration, then HVAC, then computers.
Step 4
Check for equipment damage. Look for error codes, unusual sounds, or tripped breakers before resuming full operations.
Step 5
Document the outage. Record start and end times, equipment affected, and inventory losses for insurance purposes.
Step 6
Notify customers if the outage causes service disruption. A brief email or social post maintains trust.
Other considerations
Insurance claims after power outages require documentation. Keep photos of spoiled inventory, temperature logs, and receipts for any emergency expenses like generator fuel or dry ice.
The SBA's disaster loan programs are available to small businesses after declared disasters, and FEMA's business continuity guidance includes checklists for small and medium businesses. Ready.gov's business resources also include free post-outage documentation templates.
Monitor real-time outage data on PowerOutage.us during any storm event. Our maps update every 10 minutes and show utility-level restoration progress by county. Knowing that your utility has restored 80% of your area gives you a realistic estimate of when to expect power back. That information helps you decide whether to stay open with backup power or close temporarily and minimize losses.