Britain is having its third heatwave. Temperatures will be very high this week.

The Met Office says South East England is in a heatwave. Other areas will be hot too.

Temperatures will be 33°C on Wednesday and 34°C on Thursday in southern England.

The hot air will move north by the weekend and make it feel muggy.

The Met Office says the hottest days will be Thursday and Friday. Temperatures will rise each day.

Southern England and Wales will be very hot. Northern Ireland and Scotland will be warm.

Many homes get too hot during the day. It's hard to sleep at night.

Most UK homes keep heat in. This makes it hard to cool them down.

If you don't have air conditioning, you can use a simple trick to cool your home.

Put a bowl of cold water in front of an open window to cool the air.

Experts say putting a bowl of cold water near a window can cool the air.

The cold water absorbs heat and makes the air cooler. The breeze helps spread the cool air.

LEAP Energy Advice says putting bowls of water around the house can help cool it down.

You can add ice to the water to cool it down faster. Put it in front of a fan if you have one.

LEAP says putting ice and water in front of a fan can make the air feel cooler.

Using a fan with the bowl of water helps, but the water alone can still cool the air.

Running a fan costs less than air conditioning. It's a good way to cool down.

British Gas says this trick is a cheap way to keep your home cool.

British Gas says using a fan can add to your bills, but it's still a good idea.

To cool a room with a fan, put ice in front of it. You can also use a box fan to push hot air out.