Public Health England (PHE) has issued a health warning as London braces for a heatwave over the next few days.
The east of England was hit by a heatwave today, and soaring temperatures are now forecast for the south east and the capital.
The Met Office today declared a Level 3 heatwave alert, which means the hot weather has officially arrived in the east of England – and it is forecast to last until Friday morning.
Meanwhile, a level 2 heatwave alert, a warning that heatwave conditions are likely, has also been issued across the south east and London although many places may see warm temperatures, and it's possible the hot weather will return for the bank holiday weekend.
The government health body has called on people to look out for older people, children, and those with underlying conditions, whose health may be affected due to the heat over the coming days.
"Now the heatwave has arrived, people will likely be out and about more enjoying the summer sun. That’s why it’s really important to remember that there are some people whose health suffers in hot weather," said Dr Thom Waite, a member of the extreme events team at PHE.
"We’re urging everyone to keep an eye on those you know who may be at-risk this summer. If you’re able, ask if your friends, family or neighbours need any help.
"The hot weather will put an extra strain on bodies and people may feel the ill-effects. Each year we hear stories of people who have fallen seriously ill because, even though it’s hotter, they may wear clothes which are too warm for hot weather, they may not drink enough or try to do too much."
Dr Waite added: "We know it’s still the school holidays for many and with a number of high profile events planned for this weekend it’s really important people in the affected areas keep in mind that the coming days may feel hot, so stay hydrated, look out for others and keep an eye on forecasts. That way we can all help each other stay well this summer."
In June, bookies were betting on this summer becoming the hottest on record.