A power outage shuts down refrigerators, heating and cooling, medical equipment, sump pumps, and internet service, potentially causing havoc throughout the home.

When the power cut out during the last big storm, what stopped working first in your house? Most people reach for a flashlight and figure the worst part is sitting in the dark until the utility trucks show up.

Lights are the obvious loss and the least of your problems. The major trouble shows up hours later in a thawing freezer, a garage door that won't open, or a phone at 4% with no way to call for help. Power disruptions reach into almost every corner of a modern home, and most of what they touch stays out of sight until it fails.

How Long Does Food Last When the Refrigerator Stops?

Your refrigerator keeps food safe for about four hours without power as long as the door stays shut, according to FoodSafety.gov. A full freezer holds for about 48 hours, and a half-full one lasts around 24.

After that, meat, poultry, seafood, eggs, leftovers, and opened milk need to go. Hard cheese, butter, and most condiments hold up fine, but tasting food to check it tells you nothing, since the bacteria behind food poisoning rarely change the smell or flavor.

A cheap appliance thermometer in each compartment shows you exactly where things stand when the lights come back.

Home Heating and Cooling Systems May Stop Running

Most modern gas furnaces rely on electricity to light the burner and push warm air through the vents, so a gas-heated home goes cold in an outage just like an all-electric one.

Indoor temperatures climb within hours when the AC shuts off in a Georgia summer. Older adults, infants, and anyone with heart or breathing conditions face the highest risk of heat illness.

Winter outages carry their own cost, since pipes along exterior walls freeze and burst when indoor temperatures drop far enough.

Medical and Security Devices Can Lose Power

More than 4.6 million Medicare beneficiaries living at home rely on electricity-dependent medical equipment or health services, according to the HHS emPOWER Program.

Here are the devices that shut down when the grid does:

• Oxygen concentrators: Users switch to backup tanks, which run out within hours
• CPAP machines: Sleep apnea patients go without treatment overnight
• Power wheelchairs and lifts: Mobility stops once the battery drains
• Insulin storage: Medication loses effectiveness without refrigeration

Many utilities keep a list of customers who depend on medical equipment, so call yours and register anyone in your home who qualifies.

Water Supply Can Be Affected in Homes That Rely on Electric Pumps

Homes on private wells lose running water as soon as the well pump stops. The pressure tank holds enough for a few flushes, and then the taps run dry.

Septic systems with an electric lift or grinder pump stop moving waste, so every flush adds to a tank with nowhere to drain. An electric water heater keeps its stored water warm for a while but won't reheat until power returns.

Internet and Remote Work Interruption

Roughly 35% of employed Americans did some or all of their work at home on days they worked, according to the Bureau of Labor Statistics. An outage costs them missed meetings and deadlines on top of a dark kitchen.

Here's what goes offline with the power:

• Modem and router: Home internet drops the second they shut off
• VoIP landlines: Phone service through your internet provider dies with the router
• Laptops and monitors: Work stops when the battery runs out
• Cell towers: Many run on backup power that fades during long, widespread outages

Electronics May Be Damaged by Surges When Power Returns

Voltage spikes and flickers as crews restore service, and that burst hits every device still plugged in, from TVs and gaming consoles to the control boards inside your fridge and HVAC system.

Unplug computers, TVs, and chargers when the lights go out, and leave a single lamp switched on so you know when service returns. Wait a few minutes before plugging everything back in and restarting the AC.

A whole-home surge protector at the electrical panel guards hardwired appliances that a power strip can't reach.

Can Solar and Battery Storage Keep Your Home Running During an Outage?

A home battery switches on automatically when the grid fails, so the lights barely flicker. Paired with rooftop solar, it recharges every sunny day and keeps going through a multi-day outage.

Many homeowners set the battery to cover the circuits that matter most, like the refrigerator, well pump, medical equipment, and Wi-Fi router. Solar companies such as Helios Energy build systems around batteries like the Tesla Powerwall 3 and FranklinWH aPower 2, sized to how long your home needs to stay powered.

A system sized for your critical loads keeps the house livable while the rest of the street waits on utility crews.

Frequently Asked Questions

Is It Safe to Run a Portable Generator in the Garage?

No. Generators produce carbon monoxide, which builds up in a garage even with the door open. The CDC recommends placing a generator at least 20 feet from your home, with the exhaust pointed away from windows and doors.

Does Homeowners Insurance Cover Food Lost in an Outage?

Some policies cover food spoilage, usually through an add-on with a set dollar limit. Utilities rarely reimburse spoiled groceries unless the outage came from their own negligence. Check your policy before storm season.

How Do You Report a Power Outage?

Most utilities take reports through an app, a text line, or an online outage map. Report it yourself, since crews use the number and location of reports to plan repairs.

How Close Can You Get to a Downed Power Line?

Stay well back and keep children and pets away. A line that isn't sparking still carries enough current to kill, and the ground around it becomes energized. Call your utility and 911 instead of moving it yourself.

Plan for Power Disruptions Before the Next Storm

Walk through your house tonight and point at everything with a plug, a pump, or a battery that needs charging. The list shows what power disruptions affect in your home and which items need a plan before hurricane season returns.

Find more informative content on our website.

This article was prepared by an independent contributor and helps us continue to deliver quality news and information.