A heatwave is easy to underestimate. It looks like good weather, but for a household it behaves like any other crisis: the power grid is strained, water can be restricted, and the people around you who are most at risk reach danger quickly. The reassuring part is that the basics of home preparedness still apply in summer. They are simply turned upside down from winter. The goal is the same as in any crisis: seven days of home preparedness you can rely on.
Why a heatwave is a preparedness situation
When millions of homes and workplaces run cooling at the same time, demand on the grid spikes, and a long spell of heat raises the risk of local power cuts at the worst possible moment. Prolonged drought can lead to water restrictions. And the heat itself is a health emergency: heat exhaustion and heatstroke build quietly, above all for older adults, people with chronic illness, small children and pets.
1. Water comes first
In normal conditions you plan for three to five litres per person per day. In a heatwave you need more, both to drink and to cool down. Store water now, keep a collapsible container, and keep a way to make water safe if the supply is restricted. See how to purify water in an emergency.
2. Stay cool without leaning on the grid
Close blinds and curtains on the sunny side during the day, open up for cross-ventilation at night when the air is coolest, and stay on the lowest, shadiest floor. A damp cloth on the neck and wrists cools you fast. A fan powered by a battery or power bank keeps the air moving if the electricity drops. See light and power in a crisis.
3. Power when the grid is under pressure
Keep a charged power bank for your phone, for any medical device, and for a fan. Charge everything before the hottest days arrive, while the grid is still stable.
4. Stay informed
Follow the warnings from your national weather service and keep a battery or hand-crank radio for public radio and any official emergency alert if the mobile network fails. See VMA and staying informed in a crisis.
5. Protect the most exposed
Check in every day on older relatives and neighbours, keep medicines within their safe storage temperature, and never leave a child or a pet in a warm car or room. See preparedness for older adults and for pets.
6. Recognise heatstroke and act
Confusion, hot and dry skin, a pounding pulse and faintness are warning signs. Move the person into shade, cool them with water, give fluids if they are conscious, and call 112 if the symptoms are serious. See the home first-aid kit for a crisis.
The 7-day heatwave checklist
- At least three to five litres of water per person per day, stored and dated
- A way to make water safe if the supply is restricted
- Long-life food that needs no cooking
- A cool, dark store for heat-sensitive medication
- Charged power bank and charging cables
- A battery or hand-crank radio for official information
- Damp cloths, a battery fan, and a shaded room plan
- Sun protection and electrolyte or rehydration salts
- A daily check-in plan for vulnerable family members and neighbours
Where Kapsel fits
A heatwave is not the picture most people have in mind when they think of a crisis box. Yet the core utilities overlap almost exactly: clean water, a charged power bank, a radio and a proper first-aid kit are the same things that carry a household through a hot week. That is the whole idea of a system you own before you need it, like the Kapsel Core.
Frequently asked questions
How much water do I need during a heatwave?
Plan for at least three to five litres per person per day, and more in real heat, since you lose fluid faster and also use water to cool down. Store it in advance and keep a way to make tap or natural water safe if the supply is restricted.
How do I stay cool without air conditioning?
Block the sun during the day with blinds and curtains, ventilate at night when the air is coolest, stay low and in shade, use a damp cloth on the skin, and run a battery or power-bank fan to keep air moving.
Can a heatwave cause a power cut?
Yes. Heavy cooling demand strains the grid and prolonged heat stresses the network, so local power cuts are more likely during a long heatwave. A charged power bank keeps your phone and a fan running if the power drops.
What do I do if someone has heatstroke?
Move them into shade, cool them with water on the skin and at the neck and wrists, give fluids if they are conscious, and call 112 if they are confused, stop sweating, or seem seriously unwell.
Heat rarely comes alone: a long dry spell can bring a water shortage and irrigation bans, and it raises the risk of wildfire and grass fire.