A heat health alert has been issued for London and will be in effect from 12pm on Saturday 4th July 2026 to Saturday 11th July 2026 across London.

The yellow alert has a matrix score of . This means:

Minor impacts are expected across health and social care services, including:

• increased use of healthcare services by vulnerable people
• greater risk to life of vulnerable people
• increased potential for indoor environments to become very warm
• water-related incidents may increase, including risks from cold-water shock and drowning

You can see all the weather health alerts currently in place across England on the UKHSA data dashboard.

The  advice from public health is below:

• UKHSA usually don’t advise schools to close (Hot weather and heatwaves: guidance for schools and other education settings – The Education Hub) decisions to close schools and change school times are made locally by schools based on risk assessments that they undertake.
• School staff should consult the action card and implement measures to protect pupils and staff while they are at school
• Other adjustments that schools can/should make are included Hot weather and heatwaves: guidance for schools and other education settings – The Education Hub
• Reminder for school staff to be aware of the signs of heat-related illness and what to do if they recognise these

Please can you ensure that you advise the LA if you make any changes to your school start or end time during this hot spell.

Please do contact the Health and Safety Team or Public Health Team if you need more specific advice relevant to your individual school or setting.

You can see all the weather health alerts currently in place across England on the UKHSA data dashboard.

Schools and education settings can review the Schools and Education settings action card for more information on what actions to take.