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Wales Online
Wales Online
National
Neil Shaw

What is a Heat Health Alert and what do the five levels mean?

A heat-health alert has been issued for some parts of the UK this week, with those in affected areas advised to shade or cover windows and check on the vulnerable and the elderly.

The UK Health Security Agency (UKHSA) and the Met Office have put in place a Level 2 heat-health alert for the South West, East Midlands, West Midlands, North West and Yorkshire and the Humber regions.

Meanwhile, the alert level for the East of England, South East and London has been raised from a Level 2 – which had been issued on Thursday – to a Level 3 alert, as forecasters predict highs of 32C (89F).

The alerts will be in place from 9am on Monday July 11 until 9am on Friday July 15, during which time the UKHSA recommends drinking plenty of fluids and avoiding excess alcohol, avoiding physical exertion during the hottest part of the day, and taking special care to check in on the vulnerable and the elderly who find the heat particularly challenging.

Dr Agostinho Sousa, head of extreme events and health protection at the UKHSA, said: “Heat-health alerts have now been issued to the majority of the country, with temperatures set to remain consistently high throughout the duration of next week.

“Most of us can enjoy the hot weather when it arrives, but it is important to keep yourself hydrated and to find shade where possible when UV rays are strongest, between 11am and 3pm.

“If you have vulnerable family, friends and neighbours, make sure they are aware of how they can keep themselves protected from the warm weather.”

The Heat-Health Alert Service is provided by UK Health Security Agency (UKHSA) from June - Sept and covers England only.

The Met Office forecasts day-time and night-time maximum temperatures, which are monitored regionally. When certain heat thresholds are passed, a warning is issued and sent to relevant health professionals and people working in social care. This enables health and social care professionals to take action to minimise the impact of the heat on people's health.

What the levels mean:

Level 0: Long-term planning to reduce risk from heatwaves and includes year-round joint working to reduce the impact of climate change and ensure maximum adaptation to reduce harm from heatwaves. This level is there to serve as a reminder to authorities of the need to plan in advance of the summer months to ensure preparedness.

Level 1: Green — Summer preparedness and long-term planning

This is the minimum state of vigilance during the summer. During this time social and healthcare services will ensure that all awareness and background preparedness work is ongoing.

Level 2: Yellow — Alert and readiness

Triggered as soon as the risk is 60% or above for threshold temperatures being reached in one or more regions on at least two consecutive days and the intervening night. This is an important stage for social and healthcare services who will be working to ensure readiness and swift action to reduce harm from a potential heatwave.

Level 3: Amber — Heatwave action

Triggered when the Met Office confirms threshold temperatures for one of more regions have been reached for one day and the following night, and the forecast for the next day has a greater than 90% confidence level that the day threshold temperature will be met. This stage requires social and healthcare services to target specific actions at high-risk groups.

Level 4: Red — National Emergency

Reached when a heatwave is so severe and/or prolonged that its effects extend outside the health and social care system. At this level, illness and death may occur among the fit and healthy, and not just in high-risk groups.

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