Syndromic surveillance summary: 28 June 2026 week 26
Updated 9 July 2026
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Reporting week 26: 22 to 28 June 2026
During week 26, syndromic indicators for the impact of heat increased across all syndromic surveillance systems, in line with the red heat-health alert in place across parts of England.
Remote health advice syndromic surveillance system
During week 26, there were large increases in both ‘heat exposure or sunburn’ triaged calls and online assessments, particularly in adults aged 45 years and over. The period of increased heat exposure or sunburn triaged calls and online assessments coincided with the red heat-health alert in place across parts of England, before decreasing over the weekend (28 to 29 June). Insect bites also increased for both calls and online assessments and were above seasonally expected levels. Daily NHS 111 triaged calls increased for diarrhoea (particularly in children under 1 year and in adult age groups) and vomiting (particularly in children 1 to 14 years).
Access the remote health advice syndromic surveillance bulletins
GP in-hours syndromic surveillance system
During week 26, GP consultation rates for ‘heat or sunstroke’ increased, in line with the red heat-health alert in place across parts of England. Consultation rates for ‘insect bites’ also increased and were above seasonally expected levels. GP consultation rates for allergic rhinitis stabilised and are at seasonally expected levels. GP consultation rates for gastroenteritis, diarrhoea and vomiting decreased or were stable, but remained above seasonally expected levels.
Access the GP in-hours syndromic surveillance bulletins
GP out-of-hours syndromic surveillance system
During week 26, there was a large increase GP out-of-hours daily contacts for ‘heat or sunstroke’, coinciding with a red heat-health alert in place across parts of England, before decreasing during the weekend of 28 and 29 June. Contacts for chest pain decreased throughout the week.
Access the GP out-of-hours syndromic surveillance bulletins
Emergency department syndromic surveillance system
During week 26, emergency department attendances for heat or sunstroke increased (particularly in adults aged 45 years and over), reaching a peak on Friday 26 June in line with the red heat health alert in place across parts of England, and then decreased as the weather cooled over the weekend (28 and 29 June). ED attendances for asthma increased, particularly in adults aged 15 to 44 years but remained below seasonally expected levels. Attendances for gastroenteritis increased slightly, particularly in children 0 to 14 years. Cardiac attendances (including myocardial infarction) decreased throughout week 26.
Access the emergency department syndromic surveillance bulletins
Ambulance syndromic surveillance system
During week 26, there was a sharp increase in daily ambulance calls for ‘impact of heat or cold’, before decreasing over the weekend of 28 and 29 June, in line with the red heat-health alert in place across parts of England. Calls for ‘difficulty breathing’, ‘unconscious or passing out’, ‘collapsed with unknown problem’, ‘allergic reactions’, and ‘injuries’ also increased through the week and subsequently decreased at the weekend, also coinciding with the red heat-health alert.