It’s that time of year again when the mass summer holiday exodus begins, with Brits heading abroad to destinations where they can brag about the glorious weather or spend hours on the beach.

What do you do if it should become too hot, however?

[Read more: Holidaymakers warned over scorching European temperatures]

This is the problem currently facing Brits holidaying across central and southern Europe as the temperature tops 40C and hits 43C in parts of Spain.

We found out everything you need to know on how to stay safe when the mercury rises.

Who is at risk from high temperatures?

When temperatures soar, people with some health problems are at risk.

These include children and older people, those with cardiovascular conditions, respiratory conditions, renal conditions, Parkinson’s and diabetes.

When it gets very hot, however, even those in good health are at risk.

Here’s Public Health England’s advice on what to do.

1. Avoid the hot midday sun

The sun is at its hottest between 11am and 3pm so avoid being out in the heat between these times.

In Cyprus, authorities have banned all outdoor work from commencing until 4pm.

2. Use plenty of sun cream

Wear sunscreen with at least SPF 15.

Make sure it has good UVA and UVB protection and reapply every hour.

3. Wear good sunglasses

Make sure your sunglasses have the proper UV protection to protect your eyes from the sun’s rays.

[Read more: Summer eyecare: Should we all be changing our sunglasses every two years?]

4. Loose fitting clothes

Try and wear clothes that are light and loose fitting, and a hat to keep cool.

5. Stay hydrated

Always keep plenty of fluid close by.

If you feel dizzy or have a headache, then use rehydration sachets from a pharmacy.

6. Don’t over exert yourself

Don’t exercise more than you need to in the extreme heat.

7. Keep your room cool

Close curtains to keep out the sun’s rays and open windows to allow cool air in.

Turn off an electrical items you don’t need and keeps lights off where possible.

What are your tips for staying cool in extreme weather? Let us know in the Comments section below.