The UK Health Security Agency's latest update, published on 20 June 2026, says every region in England will be under a heat-health alert from 11am on Monday 22 June 2026 until 11.59pm on Wednesday 24 June 2026. Amber alerts apply to the East Midlands, West Midlands, South East, South West, East of England and London, while the North West, North East and Yorkshire and the Humber are under yellow alert. (gov.uk) This is a wider alert than the position set out on 18 June, when amber status covered the East of England, South East, South West and London, yellow covered the East and West Midlands, and other regions were unaffected. In practical terms, the June 22 to 24 window is an England-wide operational notice rather than a localised warning. (gov.uk)
The heat-health alert system sits inside the wider Weather-Health Alerting system run by UKHSA in partnership with the Met Office. UKHSA says the service is designed as an early warning for health and social care organisations, responders, the voluntary sector and government departments, while remaining publicly accessible. The core alerting season runs from 1 June to 30 September, with provision for alerts outside that period if conditions require it. (ukhsa-dashboard.data.gov.uk) The system is impact-based. UKHSA says alert colours are set according to both the likely effect on health and the likelihood of those effects being realised. Green is preparedness only, yellow is a response level aimed chiefly at protecting vulnerable groups, amber is an enhanced response with broader service implications, and red denotes an emergency response with significant risk to life. (ukhsa-dashboard.data.gov.uk)
The difference between yellow and amber is important for planners. UKHSA's regional yellow alert pages describe minor impacts likely across health and social care, including increased use of services by vulnerable people, greater risk to life among those groups, the growing chance of indoor overheating and more water-related incidents. (ukhsa-dashboard.data.gov.uk) Amber is a more serious threshold. UKHSA's amber regional pages say significant impacts are likely across health and social care, including a rise in deaths, higher demand on services, overheating in hospitals and care homes, pressure on medicines management and staffing, and wider knock-on effects such as transport disruption, pressure on power supplies and more water-related incidents. (ukhsa-dashboard.data.gov.uk)
For commissioners, the official UKHSA action card says a yellow alert should prompt local risk assessment, staff awareness work, closer engagement with community and voluntary organisations and more targeted communication to vulnerable and underserved groups. At amber, the same guidance moves on to invoking business continuity or hot-weather plans, issuing media messages, reviewing the safety of public events, reducing unnecessary travel where possible and mobilising community support. (gov.uk) For providers such as hospitals, care homes, GP services and home-care teams, the provider action card is more operational. It advises services to keep designated cool areas below 26°C, monitor indoor temperatures, check staffing capacity, protect medicine storage, promote hydration, prioritise high-risk patients and ensure discharge planning takes account of home temperatures and any need for extra support. (gov.uk)
UKHSA's public guidance says anyone can become unwell in hot weather, but the highest-risk groups include people aged 65 and over, babies and young children, pregnant women, people with heart, breathing, kidney or neurological conditions, people taking certain medicines, people with serious mental ill health, those who are already dehydrated, people experiencing homelessness, people living alone, outdoor workers and those spending long periods physically active outside. (gov.uk) The broader public-health case for treating heat as a service-pressure issue is now clear in official guidance. UKHSA says all of the UK's warmest years on record have occurred since 2002, temperatures exceeded 40°C for the first time in July 2022, an estimated 2,803 people aged 65 and over died due to heat in England in 2022, and annual heat-related deaths may triple by 2050. (gov.uk)
UKHSA's immediate public advice is straightforward but material. The agency says people should drink fluids, limit alcohol, avoid direct sunlight where possible between 11am and 3pm, move exercise or dog walks to cooler hours, and keep homes cooler by closing blinds or curtains on sun-facing windows and opening windows when the air outside is cooler. It has also urged people to check on older relatives, neighbours and anyone with underlying health conditions. (gov.uk) The same guidance stresses the need to recognise heat exhaustion and heatstroke early. UKHSA says hot weather can lead to dehydration, overheating and heat illness, while its public guidance states that suspected heatstroke should be treated as a medical emergency, with 999 called and immediate cooling started at once. (gov.uk)
This is also a useful reminder that a heat-health alert is not the same thing as a general weather warning. UKHSA's guidance says heat-health alerts are aimed chiefly at the health and social care sector and the responder community, while Met Office extreme heat warnings are intended for a wider audience, even though the two systems are designed to work alongside one another. (ukhsa-dashboard.data.gov.uk) For local authorities, NHS bodies and care providers, the 22 to 24 June 2026 alert window is therefore an operational signal as much as a public message. For households, the central point is narrower but no less important: take protective steps before temperatures peak and pay closest attention to people whose health, medication or housing make hot weather harder to manage. (gov.uk)