Heatwaves are becoming increasingly common across the UK.

While sunny weather can be enjoyable, prolonged periods of heat can make homes uncomfortable and potentially dangerous. Keeping your home cool is one of the most effective ways to protect your health and wellbeing during extreme temperatures.

This guide provides practical, affordable and easy-to-follow advice for residents on staying cool, reducing overheating and protecting vulnerable household members.

Taking Heatwaves Seriously

High indoor temperatures can increase the risk of dehydration, poor sleep, heat exhaustion and heatstroke. Homes can often remain hotter than the outdoor temperature, especially flats, loft conversions and south-facing properties.

The Golden Rule: Keep Heat Out

The most effective cooling strategy is to prevent heat entering your home. Close windows, blinds and curtains during the hottest hours and only ventilate when outdoor temperatures are cooler than indoors.

Best Times to Open and Close Windows

Open windows early in the morning, late in the evening and overnight when safe. Close them during peak afternoon temperatures. This simple habit can significantly reduce indoor overheating.

Using Curtains, Blinds and Shading

Sunlight entering through windows quickly warms rooms. Keep curtains, blinds or shutters closed on sun-facing windows.

Creating Effective Ventilation

Cross-ventilation is one of the best natural cooling methods. Open windows on opposite sides of the property during cooler periods to encourage airflow through the home.

Reducing Heat from Appliances

Ovens, tumble dryers, dishwashers, computers and gaming consoles all generate heat. Use them during cooler parts of the day where possible and switch off appliances that are not in use.

Keeping Bedrooms Cool

Sleep can become difficult during hot weather. Keep curtains closed during the day, use lightweight bedding, ventilate in the evening and consider sleeping in the coolest room of the property.

Loft Rooms and Top-Floor Flats

These properties often experience the highest temperatures. Additional ventilation, blackout blinds and careful management of sunlight can make a significant difference.

Energy-Efficient Cooling Tips

Before relying on electrical cooling, maximise natural ventilation, shading and airflow. Fans are generally inexpensive to run and can improve comfort significantly.

Keeping Pets Cool

Provide constant access to fresh water, cool resting places and avoid walking pets on hot surfaces. Never leave animals in parked vehicles.

Protecting Children During Hot Weather

Children can overheat quickly. Encourage regular drinking, provide shaded play areas and avoid strenuous activities during the hottest part of the day. Babies are especially vulnerable to heat and sunlight. Ensure regular feeding, lightweight clothing, shaded environments and cool sleeping spaces.

Looking Out for Vulnerable Neighbours

Older residents, people with disabilities and those living alone may be particularly vulnerable during heatwaves. A quick check-in can make a significant difference.

Recognising Heat Exhaustion

Symptoms include dizziness, headaches, nausea, excessive sweating, tiredness and muscle cramps. Early action can prevent more serious illness. Heatstroke requires immediate medical attention. Symptoms include confusion, collapse, seizures and a very high body temperature.

Call 999 immediately if suspected.

Top 10 Heatwave Tips

  • 1
    Close curtains before direct sunlight enters.
  • 2
    Open windows during cooler hours only.
  • 3
    Create cross-ventilation when possible.
  • 4
    Drink water regularly throughout the day.
  • 5
    Keep children and pets hydrated and cool.
  • 6
    Reduce appliance use during hot periods.
  • 7
    Use fans efficiently.
  • 8
    Keep bedrooms cool for sleep.
  • 9
    Check vulnerable neighbours.
  • 10
    Know the signs of heat exhaustion.

Frequently Asked Questions

Q: Does opening windows cool a house during a heatwave?
A: Only when outdoor temperatures are cooler than indoor temperatures.

Q: Should I keep curtains closed?
A: Yes, especially on windows receiving direct sunlight.

Q: Are fans expensive to run?
A: Most fans cost only a few pence per hour and are generally cost-effective. The benefit of using a fan during a heatwave outweighs the cost to run it.

Q: Who is most at risk during a heatwave?
A: Older people, babies, young children, pets and those with existing health conditions.

Useful Resources