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Heat Wave Preparedness Guide

Heat Wave preparedness guide for US residents. Learn warning signs, immediate actions, and how to protect your family before, during, and after.

Average Warning Time: Days average

Your emergency plan must be ready before a heat wave warning is issued.

Why Heat Wave Preparedness Matters

Extreme heat can cause more deaths than any other weather event. In the United States, heat waves affect Southwest and Southeast, but preparedness principles apply regardless of where you live.

The difference between a close call and a tragedy often comes down to preparation made weeks or months before the event. People who have rehearsed their evacuation routes, stocked their emergency kits, and established family communication plans consistently fare better than those who rely on improvisation under pressure.

What to Do Before a Heat Wave

Before the threat arrives, your goal is to reduce risk, build supplies, and establish a clear plan. Start with a household meeting to assign roles — who grabs the emergency bag, who is responsible for pets, who picks up children from school if evacuation orders come during work hours.

Sign up for your local emergency alert system. Most counties have a free text and email notification service that will push heat wave warnings directly to your phone. This is faster and more reliable than TV or radio in the critical first minutes of a warning.

What to Do During a Heat Wave

  • Stay indoors in air-conditioned spaces.
  • Drink plenty of water and avoid alcohol and caffeine.
  • Check on elderly neighbors or those with health issues.
  • Listen to emergency broadcasts.

What to Do After a Heat Wave

After a heat wave, resist the urge to return home or begin cleanup until authorities confirm it is safe. Document all damage with photos before making repairs or touching anything. Contact your insurance company immediately. If you are displaced, register with FEMA at DisasterAssistance.gov — registration opens federal aid programs including temporary housing assistance, home repair grants, and low-interest disaster loans.

Monitor yourself and family members for signs of stress or trauma in the days and weeks following a heat wave. Crisis counseling and mental health resources are available through FEMA's Disaster Distress Helpline (1-800-985-5990).

Most Affected Regions

Heat Waves most commonly affect Southwest and Southeast in the United States. Residents in these areas should have heat wave-specific plans and know their local warning systems.

Related Guides

Preparedness Tools

Frequently Asked Questions

How do I prepare for a heat wave?
Heat Wave preparation starts before the threat arrives. Have a 72-hour emergency kit stocked with water, food, medications, and important documents. Know your local warning systems and have a household communication plan. Stay indoors in air-conditioned spaces..
What should I do immediately during a heat wave?
During a heat wave: Stay indoors in air-conditioned spaces. Drink plenty of water and avoid alcohol and caffeine. Check on elderly neighbors or those with health issues. Listen to emergency broadcasts.
How much warning time do I have before a heat wave?
The typical warning time for a heat wave is Days average. This is why having a pre-made plan and emergency kit is critical — there may not be time to gather supplies when the warning comes.
Which US regions are most affected by heat waves?
Heat Waves most frequently affect Southwest and Southeast. However, heat waves can occur across a wider area — always check local hazard maps for your specific location.
What emergency supplies do I need for a heat wave?
For heat wave preparedness, your emergency kit should include: at least 1 gallon of water per person per day (for 7 days), non-perishable food, a battery-powered or hand-crank NOAA weather radio, flashlights with extra batteries, a first aid kit, a whistle to signal for help, dust masks, and local maps.