Age UK are reminding people to check on elderly relatives as temperatures continue to rise this week.
While many will welcome the chance to enjoy the sunshine, experts fear the effects of dehydration and heatstroke on more vulnerable people.
The Met Office is predicting that it could get as hot as 37 degrees C.
Warnings have also been issued to people travelling on public transport and people are being encouraged to stay hydrated by carrying a bottle of water with them to avoid overheating.
- Click below for Rob Setchell's report
- Click below for Elodie Harper's report
The fire service is also on high alert over the increased potential for field fires and people getting into trouble while cooling off in the water.
What to do if you are experiencing heat exhaustion:
- Find a cool place and loosen tight clothes
- Drink plenty of water or fruit juice
- Sponge yourself with water or have a cool shower
The same message has been sent out to pet owners to help animals stay cool in the summer weather.
They are being advised to make sure their pets have plenty of access to shade and fresh water.