Summer Blackout Survival Guide

Understanding Heat Danger

When power fails during a heat wave, your air-conditioned home can reach dangerous temperatures within 2-4 hours. Understanding heat risks helps you take appropriate action.

Heat Index: What It Feels Like

The "heat index" combines air temperature and humidity to show what the temperature actually feels like to your body. High humidity prevents sweat from evaporating, making it harder to cool down.

Who is Most Vulnerable?

• Elderly (65+): Bodies don't regulate temperature as well; may not sense thirst
• Infants and young children: Can't regulate temperature; can't ask for water
• People with chronic conditions: Heart disease, diabetes, obesity increase risk
• Those on certain medications: Diuretics, beta blockers, antihistamines, psychiatric medications affect heat response
• Outdoor workers: May have been heat-exposed before outage
• Athletes: May push through early warning signs
• People without AC experience: Bodies not acclimated to heat

Recognizing Heat Illness

Staying Cool Without AC

When power fails, you need strategies to lower your body temperature. The goal is to prevent your core temperature from rising dangerously.

Cooling Priority: Focus on People, Not Spaces

Without AC, you can't cool your whole house. Focus on keeping people cool, not rooms:

• Apply cooling directly to bodies (wet cloths, fans on skin)
• Minimize activity during hottest hours (10am-4pm)
• Wear loose, light-colored, lightweight clothing
• Stay hydrated continuously
• Take cool showers/baths throughout the day
• Rest during peak heat, be active during cooler evening/morning

Hydration is Critical

During extreme heat, you can lose 1-2 liters of fluid per hour through sweating. Dehydration accelerates heat illness.

Hydration Guidelines

• Drink before you're thirsty - thirst means you're already dehydrated
• Minimum 1 gallon per person per day during heat waves (double normal)
• Replace electrolytes if sweating heavily - water alone isn't enough
• Avoid alcohol and caffeine - they dehydrate you
• Monitor urine color - should be light yellow; dark yellow = dehydrated
• Elderly may not feel thirst - remind them to drink regularly

Use our Water Storage Calculator to determine how much water you need.

Backup Power for Cooling

A power station or generator can run fans or even a small portable AC unit, making a significant difference in comfort and safety.

Power Requirements

• Box fan: 50-100 watts
• Tower fan: 40-60 watts
• Portable AC (8,000 BTU): 700-1,000 watts
• Window AC (small): 500-1,500 watts
• Refrigerator: 100-400 watts (plus surge)

Use our Generator Size Calculator and Power Runtime Calculator to plan your backup power.

Food Safety During Heat Outages

High temperatures make food spoil faster. During a summer blackout, your refrigerator becomes a critical concern.

Food Temperature Rules

• Refrigerator: Keeps food safe ~4 hours with door closed
• Full freezer: ~48 hours with door closed
• Half-full freezer: ~24 hours
• Danger zone: 40°F - 140°F (bacteria multiply rapidly)
• Discard: Meat, dairy, eggs, prepared foods above 40°F for 2+ hours

Maximize Refrigerator Time

• Keep doors closed - every opening loses cold air quickly
• Group food together - items keep each other cool
• Add ice if you have it to extend cooling
• Move critical items to freezer (if you have one) early in outage
• Use coolers with ice for items you need to access frequently

What to Eat First

1. Perishables from refrigerator (first 4 hours)
2. Frozen foods as they thaw
3. Non-perishable pantry items

Protecting Medications

Many medications require cool storage and degrade rapidly in heat. This can be life-threatening for medications like insulin.

Temperature-Sensitive Medications

• Insulin: Degrades above 86°F. Unusable if exposed to high heat.
• Thyroid medications
• Heart medications (nitroglycerin especially)
• Antibiotics
• Asthma inhalers: Can explode in extreme heat
• Suppositories and creams
• Vaccines

Protecting Medications Without Power

• Store in coolest part of home (basement, interior room)
• Use a cooler with ice packs - don't let medications contact ice directly
• Insulated lunch bags with ice packs work for small amounts
• Know your medication's heat tolerance - check package insert
• Have backup supply if possible
• Contact your pharmacy - they may have emergency cooling

When to Leave Home

Sometimes leaving for a cooled location is the safest option. Don't let pride or inconvenience keep you in a dangerous situation.

Leave If:

• Indoor temperature exceeds 95°F with no way to cool down
• Anyone shows signs of heat exhaustion that isn't improving
• You have infants, elderly, or people with health conditions
• You're running low on water
• Outage is expected to last more than 24 hours during heat wave
• Temperature-sensitive medications are at risk

Where to Go

• Cooling centers: Check local government/news for locations
• Shopping malls: Often have backup generators
• Libraries: Many serve as cooling centers
• Movie theaters
• Friends/family with power
• Hotels: If extended outage expected

Summer Blackout Preparedness Checklist