Thousands more people attended hospital A&E departments compared with 2017 due to the heatwave.

Bosses say this has been caused by an "unprecedented summer surge" and heat-related ailments.

At The Princess Alexandra Hospital NHS Trust 74% of people were seen, treated and admitted or discharged within the four hour target period.

That's slightly better than July 2017 when 73.3% were dealt with in four hours. Hospitals are supposed to admit or discharge 95% of patients within the target time. Three years ago 85.9% were seen within four hours.

Emergency admissions have also increased at the hospital The Princess Alexandra Hospital NHS Trust. Last month 2,125 patients were admitted after turning up at A&E, a 12% rise on 2017.

At Barking, Havering and Redbridge University Hospitals NHS Trust 81.7% of people were seen, treated and admitted or discharged within the four hour target period.

That is down on July 2017 when 88% were dealt with in four hours. Hospitals are supposed to admit or discharge 95% of patients within the target time. Three years ago 95.6% were seen within four hours.

NHS England figures show that 9,226 people attended the trust’s emergency departments last month, 434 more than in July 2017. Attendances in June were also higher than usual, with 8,882 patients arriving at A&E.

Nationally record numbers of people flooded to emergency departments in July, with respiratory problems, dehydration and other illnesses associated with the hot weather.

Across England almost 2.2 million patients attended A&E in July, 100,000 more patients than the same month in 2017, with emergency admissions also rising by 6.3%.

An NHS England spokesman said: “As temperatures soared, the NHS saw an unprecedented summer surge last month with a record 2.2 million patients attending A&E, and, thanks to the hard work of staff, nine in 10 people were seen, treated and admitted or discharged within four hours."

Nick Scriven, president of the Society for Acute Medicine, said the increased admissions during the heatwave had given staff no respite from the pressures and stresses of winter.

"What is of particular concern now, however, is that the summer months are traditionally the time acute hospitals and frontline staff have to recharge the batteries - this year we have had no respite and draining conditions," he explained.

"Last year NHS leaders admitted it took until October to recover from winter 2017 and we are now only a few months away from the next onslaught."

Donna Kinnair, director of nursing policy and practice at the Royal College of Nursing, said: "This summer's heatwave has hit healthcare services hard. With rising A&E attendance and admissions, hospitals up and down the country are now seeing winter conditions in summer, putting extra pressure on services that have barely recovered from the cold weather earlier this year.

"Nurses are seeing more cases of heart failure, renal failure and dehydration - all conditions linked to hotter weather.

"Older people are particularly at risk. With 20% more trusts breaching the four hour A&E target in July compared to June, it's clear our understaffed services are struggling to cope.”