Syndromic surveillance summary: 15 August 2026 week 33
Updated 20 August 2026
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Reporting week 33: 10 to 16 August 2026
During week 33, there were increases in syndromic ‘impact of heat’ indicators across all systems, with activity generally peaking on 14 August in line with an amber heat health alert in place across parts of England. There were also increases in eye problems reported in the NHS 111 and GP out-of-hours systems.
Remote health advice syndromic surveillance system
During week 33, NHS 11 triaged calls and online assessments for ‘heat exposure or sunburn’ increased in line with the amber heat health alert in place across parts of England. Daily calls and assessments peaked on 14 August but decreased over the weekend of 15 and 16 August. Calls and assessments for insect bites also increased but were within expected seasonal levels. Eye problems calls and assessments increased during week 33 and were both above seasonally expected levels. Increases were particularly noted in the 15 to 44 years age group.
Access the remote health advice syndromic surveillance bulletins
GP in-hours syndromic surveillance system
During week 33, GP in-hours consultation rates for diarrhoea and vomiting continued to decrease, although they remained above seasonally expected levels. The daily consultation rate for ‘heat or sunstroke’ increased towards the end of the week, peaking on 14 August, particularly among those aged 45 to 64 years, in line with an amber heat health alert in place across parts of England.
Access the GP in-hours syndromic surveillance bulletins
GP out-of-hours syndromic surveillance system
During week 33, daily GP out-of-hours contacts for ‘heat or sunstroke’ increased in line with the amber heat health alert in place across parts of England, before daily contacts decreased and returned to expected levels. Contacts for eye problems increased slightly but remained similar to baseline levels.
Access the GP out-of-hours syndromic surveillance bulletins
Emergency department syndromic surveillance system
During week 33, ED attendances for ‘heat or sunstroke’ increased and peaked on 13 August in line with the amber heat health alert in place across parts of in England, before decreasing over the weekend. There was an increase in attendances for gastroenteritis, particularly in children aged less than 5 years, with activity above expected levels during the reporting week.
Access the emergency department syndromic surveillance bulletins
Ambulance syndromic surveillance system
During week 33, daily ambulance calls for impact of heat or cold peaked on 13 August, coinciding with an amber heat health alert in place across parts of England, before decreasing and returning to expected levels. Daily ambulance calls for cardiac or respiratory arrest increased sharply on 14 August before decreasing through the weekend.