Another heatwave is coming with temperatures up to 39 degrees. This is just two weeks after June's heat records were broken.

The Met Office says the heatwave will peak on July 9, with London and Berkshire being the worst hit. Other areas will also be very hot.

Using an electric fan might seem like a good idea, but a doctor says it might not be the best solution. The doctor explained this in a TikTok video.

The doctor said fans do not cool us down in a heatwave. They just make our brain think we are cooler.

The doctor knows fans can make us feel cooler when it's not too hot outside. But in a heatwave, they are not enough.

Fans make our skin feel cooler, which sends a signal to our brain. This makes our brain think we don't need to sweat as much, which is a mistake. We can still get heat exhaustion.

The doctor says water is the solution. We can use a handheld fan that sprays mist or put an icy towel around our neck.

If you or your family don't have air conditioning, you should tell them about this.

The doctor wrote that fans feel good in the heat but don't actually lower our body temperature. They just trick our skin into thinking we're cooler.

To cool down, we should wet our skin first. This can be with a spray bottle, a damp shirt, or a sponge. The evaporation of water from our skin will help us cool down.

Research shows that using a fan with wet skin can reduce heat strain and dehydration.

The UK Health Security Agency has warned that the upcoming hot spell could affect health and social care services.

The Met Office says high pressure will build up across the UK, leading to warm conditions, especially in England and Wales.

Temperatures could reach high 20 degrees in parts of England and 30 degrees in the southeast. Although it might not be as hot as last week, some areas could still have heatwave conditions.