England’s chief nurse has urged people to check on their neighbours as a heatwave hits parts of the UK for the start of the school summer holidays.
Ruth May, chief nursing officer for England, said people should take care as temperatures rise, while Asthma UK urged sufferers to keep up their medication.
The mercury is expected to hit 34C (95F) in London on Wednesday as Downing Street prepares for the arrival of a new prime minister.
May said: “Like lots of people I’m looking forward to having fun in the sun with family and friends this weekend, but nobody wants to spend a pleasant day stuck in a hospital or urgent treatment centre.
“It’s really important to take simple precautions like drinking plenty of water, using high-factor sunscreen and remembering to take allergy medication if you need it – as is making sure to check in on neighbours and loved ones who can suffer the most from heat and pollen.”
People with minor illnesses are urged to check the NHS website or call 111 for help.
Dr Andy Whittamore, clinical lead at Asthma UK and a practising GP, said: “A toxic cocktail of hot humid weather and rising pollen levels this week could be extremely hazardous for the 5.4 million people in the UK with asthma, triggering deadly asthma attacks.
“Hot air and hay fever can cause people’s airways to narrow, leaving them struggling to breathe, with symptoms like coughing, wheezing, a tight chest and breathlessness.
“Hot weather can also increase the amount of pollutants, pollen and mould in the air which can trigger asthma symptoms.
“If you are worried about the weather or hay fever affecting your asthma, make sure you take your hay fever medicines, keep taking your regular preventer as prescribed by your doctor and carry your blue reliever inhaler at all times.
“We’d advise you to drink lots of water to prevent dehydration and plan any outdoor activities for earlier in the day when the air quality tends to be better.”
The Met Office has warned that the sweltering spell could bring some disruption from heavy thundery downpours.
A forecaster at the Met Office said it would be a wet start to the week for some, with a yellow weather warning of rain in place over the end of the weekend for western Scotland, Northern Ireland and parts of northern England.
This could lead to some localised flooding and travel disruption, according to the Met Office.
Temperatures will reach 28C (82F) in southern England from Monday, which will see a dry and bright start to the week.
“As we head through the week, the rain will generally begin to ease across northern areas, so the potential is for much of the UK to see some hot conditions,” the Met Office spokesperson said.
“There will be some sunshine around during the week, but also the risk of some heavy thundery downpours as well.”
Temperatures will increase as the week progresses, according to forecasters, reaching highs of 33C (91F) on Tuesday, 34C (93F) on Wednesday and 35C (95C) on Thursday.
Although the main concentration of the hot weather will be in central and south-eastern England, parts of Scotland could reach the high 20s.
For the majority of the UK, the mercury needs to hit 25C for three consecutive days to be classed as a heatwave.
This threshold increases the further south east in the country, with temperatures in London needing to reach 27C.
The maximum temperature recorded in July is 36.7C (98F), on the first day of the month in 2015 at Heathrow.
Looking ahead to next weekend, the Met Office expects temperatures to fall.
“It looks most likely that, at least by Saturday, most areas will see a bit of a drop in temperatures,” the forecaster said.
“There’s still a lot of sunshine around for the weekend and temperatures probably look to be not quite as hot, but with a summery feel staying for the weekend.”
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