On Sunday, the hottest temperature recorded in the UK, according to the Met Office, was 29.5C in Wisley, Surrey. Scotland saw its hottest day of the year, with 28.9C in Fife. Across the UK, crowds flocked to beaches and parks. Further warm weather is set to come this week, with the Met Office saying the UK could have its hottest day this year, with temperatures likely to reach 33 degrees on Tuesday in London and the south-east. After a slight drop, they could go into the mid-30s next weekend as warm air from Spain and France pushes temperatures further. Forecasters now believe there is a “30% chance” of a new record for the UK. The current temperature is 38.7C in July 2018. Health warnings have been issued by the UK’s Health Safety Authority from Monday to Friday for the south and east of England. He advised parents to keep their children out of the sun this week. One water company, South West Water, said it was looking at ways to avoid introducing water restrictions for the first time since a long heatwave in 1976. Maarten van Aalst, the director of the Red Cross air conditioning center, encouraged people to close curtains in rooms facing the sun and keep windows open at night in efforts to keep rooms cooler. He also recommended checking on the elderly and vulnerable to make sure they stay hydrated. Subscribe to First Edition, our free daily newsletter – every morning at 7am. BST And it could get worse for heat-haters, as a long-term forecast from the US suggested temperatures could even reach 40C later in July. However, the Met Office said it believed there was only a 10% chance of it happening. “It’s possible. It’s not out of the realm of possibility that we could see temperatures above 40 degrees,” said Dan Stroud, a meteorologist at the weather bureau. Stroud said: “By next weekend temperatures are picking up and back into the 30s. Next weekend we’re looking for temperatures to top 32 degrees across England and Wales, but there is a core stretching from Hampshire through central London and south-east into East Anglia where temperatures could top 35 degrees.”