How to Protect Your Tech During a British Heatwave
A 32°C afternoon in Birmingham is a novelty until your laptop fan starts sounding like a small aircraft halfway through a video call. British homes are built to hold warmth in, not to shed it, which is lovely in February and less lovely in July. Your devices feel the difference before you do: fans spin up, phones dim their own screens, and a machine that was perfectly happy in spring starts throttling itself mid-spreadsheet.
Most overheating is preventable with a bit of planning. Here is how to get your tech through a heatwave without cooking it.
Why British heatwaves are harder on gadgets than they look
Two things make a UK heatwave awkward for electronics. Few homes have air conditioning, so there is no easy way to dump heat. And the hot spell usually arrives suddenly, which means nobody has changed their habits yet.
Phones and laptops are generally rated for comfortable operation somewhere around 0–35°C ambient. On a desk near a sunny window, it does not take much for the air around a device to drift past that. Add the heat the device makes itself — charging, gaming, video calls, background backups — and you have a machine fighting two battles at once.
Laptops and desktops: airflow first, everything else second
Most laptop overheating is a ventilation problem. Soft surfaces — beds, sofas, cushions, an actual lap — block the vents underneath. Put the machine on a hard, flat surface instead. If it already runs warm, prop the back edge up by a centimetre or two. A stand, a couple of rubber feet, even a stack of coasters will do more than you would expect.
Quick wins for laptops
- Move it off the windowsill and out of direct sun. Glass concentrates heat like a greenhouse.
- Lower the screen brightness. The display is one of the biggest power draws, and power becomes heat.
- Clean the vents. A can of compressed air, used in short bursts, shifts the dust blanket that has built up since winter.
- Postpone heavy tasks — video exports, game downloads, large cloud syncs — until the evening.
- If you use a cooling pad, check it actually moves air. Some are little more than plastic with a quiet fan inside.
Desktops need less fuss, but check the intake. A tower pushed against a wall, sitting on carpet, or shut inside a cupboard will happily recycle its own hot air. Dust filters clog faster than people think; a vacuum with a brush attachment run over the outside of the filter helps. Monitors also run warm, so leave a gap behind them rather than boxing them in.
Phones and tablets: heat, batteries and charging
Your phone has no fan at all. It deals with heat by slowing down, dimming the screen and refusing to charge at full speed, which is why a handset left in the sun can go from comfortable to sluggish in minutes.
Charging is the biggest avoidable heat source. Fast charging pushes current into the battery and warms it from the inside, so charging a phone that is already hot is the worst combination available. Charge in a cool room, take off a thick case, and avoid charging on a car dashboard or in a parked car at all.
A few habits that genuinely help:
- Keep devices out of direct sunlight. A table in the shade beats a sunny picnic blanket every time.
- Turn off personal hotspot when you are not using it. It is a small heater with a battery attached.
- Remove the case during long video calls or gaming sessions.
- Never leave phones, tablets or power banks in a parked car. Interiors get hot enough to damage a battery.
- Skip the fridge and the freezer. Sudden cold causes condensation inside the device, and moisture plus electronics is a far bigger problem than a warm afternoon.
If your phone displays a temperature warning, believe it. Move it into the shade, stop using it, and let it cool on its own.
Smart home kit, routers and the cupboard under the stairs
Smart home gear tends to fail quietly. A router squeezed behind a television, a hub in a sealed cabinet, a mesh node on a sunny windowsill — these all run warm anyway, and a heatwave pushes them into random reboots and dropped connections that are hard to diagnose.
Give networking equipment air. Lift it off the shelf, leave the cupboard door open, and resist stacking a hub on top of a router. Smart speakers and displays should come out of direct sun too, partly for heat and partly because bright light can confuse some screens and sensors.
Lofts, garages and conservatories are the worst places for anything with a battery or a hard drive. If a camera hub or doorbell chime lives up in the roof space, move it somewhere more temperate for the summer. One thing to leave alone: smoke and heat alarms. If you are opening windows and running fans, check they are still clear of obstructions, but do not cover or disable them.
External drives, power banks and the forgotten kit
Mechanical hard drives dislike heat more than most components, because they have moving parts and tight tolerances. Solid-state drives cope better but still slow down when they get hot. Memory cards left in a hot car, a portable drive sitting on a radiator, a power bank in a glovebox — these are the items people remember only after something stops working.
Backups are worth doing before the heat arrives, not during it. Copying hundreds of gigabytes works a drive hard, so save the big transfers for the coolest part of the day. If a battery looks swollen, feels unusually hot when idle, or smells odd, stop using it and have it checked by a qualified repairer rather than attempting a fix yourself.
A simple heatwave routine
- Close curtains and blinds on sun-facing windows during the day, then open them in the evening.
- Move laptops, consoles and charging cables to the coolest room in the house, usually downstairs or north-facing.
- Unplug chargers and docks when they are not in use; they trickle heat all day long.
- Save updates, backups and long downloads for after dark.
- Check the loft and the under-stairs cupboard once a day. If it feels like an oven, move what lives there.
When to switch things off
If a device is too hot to hold comfortably, turn it off and unplug it. Do not wrap it in towels to protect it from the air, and do not press ice packs against it — direct cold can cause condensation, and damp electronics are worse off than warm ones. An ice pack wrapped in a tea towel and placed nearby, not touching, is as far as that idea should go.
If a laptop or phone shuts itself down, let it rest for half an hour before restarting, and give it an easy job first. Repeated shutdowns, a swollen battery or a burning smell mean the device needs professional attention rather than another reboot. Heat damage to batteries is often invisible at the time and shows up weeks later as reduced capacity, so keep your backups current and your devices out of the sun.
None of this requires new equipment. A hard surface, a bit of shade and a slightly later gaming session will carry most kit through the hottest week of the year.
Photo: Artem Podrez / Pexels