In what is the hottest day since July 2006, a heatwave in U.K. has crowds flocking to beaches. The temperatures hit record levels, said online reports.

West London's Northold and Heathrow tagged at a temperature of 33.5 C (92.3 F) and the highest temperature before Monday was 32.2 C at south-west London's Hampton Waterworks.

By Monday night, the current weather will make way for floods and thunderstorms. According to the BBC Weather Centre, smaller weather stations were likely to deliver higher-than-expected readings since (above 33.5 C) they could be delayed.

"The humidity could make it a bit unpleasant," Met Office forecaster George Goodfellow told the Guardian. "Hopefully that will bring temperatures down a bit," he added.

The warmest reading came from Wisley, Surrey showing 36.5 C last July 19, 2006. This was the highest reading on record for the U.K. The reading makes Monday's temperature the highest recorded level in the U.K. in 7 years.

Mike Silverstone, a weather forecaster for BBC said that the heatwave heading across the Midlands to north-east Wales may result in thunder showers.

"Essentially, today the atmosphere high up is starting to cool off, but at low levels it is warming, and this is creating an unstable atmosphere," he added according to a BBC report.

However, the current weather did not match the 1976 summer, when temperatures of 32 C were seen for a period of 15 days.

Despite the heat in U.K., Britain has a new monarch, after Kate Middleton gave birth to a baby boy, who was larger in size than his father, weighing more than 8 lbs. Baby watchers flooded the facade of St. Mary's Hospital to catch a glimpse of the royal baby.

"Oh and there's lightening.There's thunder and rain at the Lindo Wing where Prince Cambridge is spending his first night with his parents," tweeted Peter Hunt, the Royal correspondent, BBC News.