The UK could break its record for the warmest day of the year for the second day in a row, with temperatures up to 33C forecast for Friday.
Some places may hit the criteria needed to officially declare a heatwave.
An official heatwave is recorded when areas reach a certain temperature for three consecutive days, with thresholds varying from 25C to 28C in different parts of the UK.
• Subscribe to ITV News on YouTube: http://bit.ly/2lOHmNj
• Get breaking news and more stories at http://www.itv.com/news
Follow ITV News on TikTok https://www.tiktok.com/@itvnews?lang=en
Follow ITV News on Instagram: https://www.instagram.com/itvnews/
Follow ITV News on Facebook: https://www.facebook.com/itvnews/
Follow ITV News on X: https://twitter.com/itvnews