Heat health alert: 19 - 23 June 2025

Type: Heat Health Alert
Alert: Amber alert
Impact: Medium
Likelihood: High

Start: 19 June 2025 at 12pm
End: 23 June 2025 at 9am

School are reminded to access: Thermal comfort guidance for schools.pdf

Risk description

Significant impacts are likely across health and social services, including:

• Significant impacts are likely across health and social care services due to the high temperatures, including:

• a rise in deaths, particularly among those ages 65 and over or with health conditions.There may also be impacts on younger age groups
• likely increased demand on all health and social care services
• internal temperatures in care settings (hospitals and care homes) may exceed recommended threshold for clinical risk assessment
• the heat affecting the ability of the workforce to deliver services
• indoor environments overheating incrasing the risk to vulnerable people living independently in community and care settings
• issues managing medicines
• staffing issues due to external factors (for example, affecting transport)
• increased demand for power exceeding capacity
• other sectors starting to observe impacts (for example, travel delays)

Health risks

High temperatures could give rise to health risks especially for the very young, older people and people with serious illnesses.

In a heatwave people may get dehydrated and their bodies may overheat. This can cause heat exhaustion which can cause many symptoms including; headaches, dizziness, nausea, vomiting, muscle weakness or cramps, pale skin and a high temperature.

It is important if you start to feel unwell to seek medical advice as soon as possible or it could develop into heatstroke which can cause serious health problems.

• Check the weather forecast and any high temperature health warnings at Heat health alerts | UKHSA data dashboard
• Contact NHS Choices on 111 or NHS Online for advice about heat exhaustion and heatstroke.
• Temperature: protect workers during hot weather (HSE) With temperatures increasing across much of the country, employers must ensure workers are protected during hot weather.
• NHS advice about preparing for hot weather (NHS website)

View the infographics issued by the UKHSA below: