Temperatures are expected to rise to 27C and yellow weather warnings are expected to be issued across the UK.
And one of the things that many moms and dads struggle with in the heat is getting their babies to sleep.
But there's a clever solution that parenting experts swear by: belly-to-belly.
“While heat may seem like a better option, one of the best ways to cool your baby down is actually to place them bare-skin on their stomach or chest,” says Kirsty Douglas, parenting expert at Kiddies Kingdom.
“This is known as 'tummy-to-tummy baby holding' and the skin-to-skin contact helps the baby regulate its body temperature to match its mother's, making it more comfortable.”
You can also keep your baby cool by dampening a muslin cloth with water and placing it over him or her, especially on the back of the neck.
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“Damp muslin cloths are great as an instant cold compress and can be made on the go with bottled water, especially if you're out and about during the day,” Kirsty explained.
“If you use this method on babies under six months of age, make sure the water is not refrigerated or too cold as babies' skin is delicate and temperature sensitive.”
If your child is over 12 months old, you can also cool off with popsicles.
Supermarket versions are often high in sugar, so Kirsty recommends making it at home using plain water or diluted fruit juice.
“To protect your baby's teeth, only offer them popsicles made with diluted fruit juice at mealtimes and brush their teeth thoroughly afterwards to remove harmful sugars,” she says.
“If you don't have time to freeze candy, another option is to use items you already have.
“Try putting teething toys in the fridge to chill them before letting your baby bite or suck on them.
“Even if he's not teething yet, this will provide some relief from the heat!”
And finally, if you're out and about in hot weather, a stroller umbrella is a great way to keep your child from getting too hot.
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Strip it off
It may sound simple, but keeping your child naked inside the house can really help them regulate their body temperature when it's hot outside. Since more of your child's skin is exposed to the sun, don't forget to apply sunscreen regularly.
Cool your bedroom before nightfall
When it's hot outside, it can be hard for your child to fall asleep, especially if your bedroom is oven-hot. If your child's room is out of direct sunlight, open the windows to let in some air. You can also keep the curtains closed to keep the room from getting too hot.
Wear a hat
This is another simple technique that really works: make sure your child wears a hat when playing outside. A hat will protect the face and head from the sun and can also help kids who don't like bright sunlight. If your child doesn't like wearing hats, try a hat with a strap that goes under the chin.
Avoid cars
The inside of a car can be one of the hottest places during a heatwave and often takes a long time to cool down, so if you have a choice, it's better to stay home than take your kids out somewhere in a hot car.
Stay hydrated
This is always important, but even more so during extreme heat: Remind your kids to drink regularly and keep them supplied with cold drinks whenever possible. Use ice as well to keep them as cold as possible.
“When you need to move around outside, a pram parasol is a great way to block the strong summer sun,” Kirsty says.
“Bugaboo accessories attach easily to the stroller and the parasol is made from UPF 50+ fabric, so your baby is well protected.”
“Even if you use sunscreen, your baby should still be kept out of the sun as much as possible, especially between 11am and 3pm when the sun is at its highest and strongest.”