What to Do When the Power Goes Out: First Hour, First Night, Day 3

Knowing what to do when the power goes out starts with three timed phases: a safety check in the first hour, a food and heat strategy through the first night, and a resupply decision by hour 72. According to FEMA Ready.gov (2024), most household injuries during blackouts happen in the first few hours, before residents settle into a routine.

Why Timing Matters During a Power Outage

The U.S. Energy Information Administration reported that in 2022, the average American customer experienced about 5.5 hours of power interruption per year (EIA, 2023). That average hides wide variation: weather-related outages from hurricanes or ice storms can last days or weeks. Acting on a checklist in the first 60 minutes prevents the cascading problems that make a long outage dangerous.

The First Hour: Safety and Assessment

Follow these steps immediately after the lights go out.

1. Check whether it is your home or the neighborhood. Look for lit windows on your street. If only your home is dark, check the main breaker panel before calling the utility.
2. Report the outage. Call or text your utility company or use their app. Most utilities use outage maps that improve their restoration estimates when more customers report in.
3. Unplug major appliances and electronics. FEMA Ready.gov (2024) recommends unplugging computers, televisions, and refrigerators to protect them from the voltage surge that occurs when power is restored. Leave one lamp plugged in so you know when power returns.
4. Locate your flashlights and battery radio. Never use candles as a primary light source. The U.S. Fire Administration (2024) identifies candles as a leading cause of home fires during emergencies.
5. Check on neighbors. Elderly residents and people who depend on powered medical equipment need an immediate welfare check.
6. Keep refrigerator and freezer doors closed. The USDA Food Safety and Inspection Service states that a closed refrigerator will keep food safe for 4 hours and a full freezer for 48 hours (USDA FSIS, 2024).

The First Night: Heat, Food, and Carbon Monoxide

After the first hour, the risks shift from surge damage to slower threats: food spoilage, hypothermia or overheating, and improper use of backup heat or cooking equipment.

Food Safety Timeline

Source: USDA FSIS Power Outage Food Safety (2024).

Heating and Cooling Without Power

During cold weather, gather the household into one interior room and use extra blankets to retain body heat. During a heat event, the Centers for Disease Control and Prevention (2024) recommends moving to a public cooling center if indoor temperatures reach 90 degrees F, especially for children, the elderly, and people with heart or lung conditions.

Never use gas generators, camp stoves, charcoal grills, or propane heaters indoors. The Consumer Product Safety Commission (2024) attributes hundreds of deaths per year to carbon monoxide poisoning from generators and alternative heat sources operated indoors or in attached garages. Place generators at least 20 feet from any door, window, or vent.

Hours 24 to 72: The Day 3 Decision Point

If power has not been restored within 24 hours, you must make two key decisions: whether to stay or go, and how to resupply critical items.

Stay or Go Checklist

Resupply Priorities at the 24-Hour Mark

1. Purchase bags of ice to extend cooler food safety.
2. Withdraw cash. ATMs and point-of-sale systems often fail during extended outages.
3. Charge all devices at your car’s USB port or at a public charging location such as a library or community center.
4. Refill any prescription medications that have fewer than 7 days remaining.
5. Fill bathtubs with water for flushing toilets if a municipal boil order is anticipated.

Communications During an Outage

Cell towers typically carry battery backup for 4 to 8 hours after a grid failure (FCC, 2023). After that, coverage becomes spotty. A NOAA Weather Radio with battery backup provides continuous National Weather Service alerts even when cellular networks are congested or down. Text messages also transmit more reliably than voice calls on overloaded networks, according to the FCC (2023).

Medical and Special Needs Households

If anyone in your home depends on electrically powered medical equipment such as a home ventilator, oxygen concentrator, or dialysis machine, register with your utility’s medical baseline or life support program before an outage occurs. FEMA Ready.gov (2024) also recommends notifying your local emergency management office so you appear on priority restoration lists.

Outage Duration by Cause: What to Expect

What to Buy First

Before any outage strikes, the single highest-impact purchase for most households is a battery backup unit that keeps phones, a CPAP, or a router running through a short outage. We recommend the APC Back-UPS 600VA UPS Battery Backup, which provides immediate bridging power for essential devices while you complete the safety steps in this guide.

Methodology

Statistics were drawn from FEMA Ready.gov, USDA FSIS, the U.S. Energy Information Administration Electric Power Annual, the FCC Consumer Guide, the U.S. Fire Administration, and the Consumer Product Safety Commission. Data were extracted and cross-checked in August and September 2026.

Updated: 2026-09-06