The MET office and UK Health Security Agency have declared a Level 4 Heat Health Alert for the London region.
Hot or very hot temperatures in London are set to continue over the weekend and peak on Monday 18 and Tuesday 19 July, reaching the mid or even high 30s.
The NHS has shared tips for staying well.
If you are planning to spend time outside, please take care and follow these NHS.UK guidelines for applying sunscreen and sun safety. Older people, young children and people with long term health conditions may need help keeping cool. Learn more about checking for signs of heat exhaustion.
For the latest updates on weather alerts in your area, head to www.metoffice.gov.uk.