Temperatures are set to hit 32C in parts of the UK this week, and while it may be nice for us at the end of summer, for our four-legged friends the heat can be deadly.

The RSPCA have warned dog owners in the past about the ‘silent killer’ that is heatwaves.

And they’ve issued another warning to people who may be thinking of leaving their dogs in the car during this September heatwave.

The RSPCA says: “Many people think it's ok to leave their dog in the car if they're parked in the shade or the windows are open.

“But a car can become as hot as an oven, even when the weather doesn't feel that warm.

Gazette: This is the advice the RSPCA give if you see a dog stuck in a hot car during a heatwaveThis is the advice the RSPCA give if you see a dog stuck in a hot car during a heatwave (Image: Getty)

“When it's 22 degrees Celsius outside, the car could reach an unbearable 47 degrees within an hour. It's very dangerous and will cause your dog suffering and harm.”

What should I do if I see a dog in a hot car on a warm day?

If you are out and see a dog in a hot car who seems to be struggling, the RSCPA has the following advice: “First, assess the dog's condition. If they're showing any signs of heatstroke dial 999 at once.

“If the dog's condition is critical, and the police haven't arrived yet, your instinct will be to break into the car to free them. But please be aware that this could be classed as criminal damage.

“You may need to defend your actions in court, so please be sure you're doing the right thing. Legally, you can commit damage if you believe the car owner would consent to it if they knew the dog was in danger.

“If you're sure you need to free the dog, tell the police what you intend to do and why. Take photos or videos of the dog. Are there any other witnesses? Take their names and telephone numbers.

“Don't be afraid to dial 999. If it's an emergency, we may not be able to get to you - and the dog - quickly enough. And as we have no powers of entry, we'd need to ask the police to help us rescue the dog. Don't worry - the police will soon let us know if the dog needs our help.”