Hot weather alert: stay well in the heat

18 Jun 2025
NHS South East London

A yellow heat alert is in place across south east London this week.

This means the hot weather could affect people’s health, especially older adults, young children and people with long-term health conditions. It also means health and care services might be busier than usual.

Help others stay safe

Check in with anyone who may need support to stay cool. That includes neighbours, friends and family.

Older people and people with health conditions may struggle to keep their homes cool or stay hydrated. A quick call or visit could help.

Keep yourself cool

To avoid becoming unwell in the heat:

  • drink plenty of water
  • wear sun cream with a high SPF
  • stay out of direct sun between 11am and 3pm
  • wear light, loose clothing

UV rays are also high this week. That means more risk of sunburn and heatstroke, especially in children.

Get more advice from the NHS heatwave guide.

Living with asthma or lung conditions?

Hot weather can make your symptoms worse. It’s important to manage your condition and avoid triggers like pollution or dry air.

Find tips to help you stay well on our respiratory support page.

Need medical help?

Your local pharmacy can help with many minor illnesses. You don’t need an appointment.

For urgent care that isn’t life-threatening, go to 111.nhs.uk. In an emergency, call 999.

Visit the UKHSA and NHS websites for advice on how to beat the heat, and heat exhaustion and heatstroke. The Met Office also shares tips through its WeatherReady campaign.