Met Office expands amber extreme-heat warning across England and Wales

The Met Office has expanded its amber extreme-heat warning across England and Wales as the hot spell spreads farther west and north, bringing eastern Wales and much of the Midlands into the warning area.

Forecasters say the hottest weather is expected early next week, with temperatures in some places forecast to reach about 35C. The warning covers Monday and Tuesday, and the Met Office says the air mass could feel more oppressive because of the warm, humid conditions.

The expansion marks a wider stage of the heat episode than the one first flagged on June 19, when the Met Office issued a rare amber extreme-heat warning for southern England and southeast Wales. By June 20, that warning had broadened into a larger part of England and Wales.

The amber category is used for heat that can bring significant health and wider disruption impacts. In this case, the warning is being described as the most severe heat warning the Met Office has issued since 2022.

How the warning has changed

The first warnings were issued as southern England faced a second period of intense heat. The latest update extends the area of concern into eastern Wales and much of the Midlands, reflecting how the hot weather is shifting across the country.

The Met Office has also said the warm spell could produce tropical nights, when temperatures do not fall below 20C. That risk is expected to be greatest in urban areas, where nights may stay particularly warm and recovery from daytime heat is harder.

Reporters have also said isolated thunderstorms are possible during the hot spell. That adds some uncertainty to the forecast, even though the main issue remains the intensity of the heat and how long it lasts.

Health and service pressure

The main concern is the impact on health, especially for vulnerable people such as older adults and people with existing health conditions. Prolonged high temperatures and warm nights can make it harder for the body to cool down and recover.

The UK Health Security Agency has issued heat-health alerts alongside the weather warning. Those alerts are intended to flag the increased health risk and the possibility of added pressure on care services and other frontline support.

Health and social care services may also feel strain if the heat persists through the start of next week. Warm nights, in particular, can worsen the effects of prolonged daytime heat and increase the burden on people already at higher risk.

What forecasters are watching next

The next question is whether temperatures actually reach or exceed 35C in the warned areas. Forecasts have been pointing to the hottest period on Tuesday and Wednesday, but the exact peak will depend on how conditions evolve.

Forecasters are also watching whether the amber warning is extended again beyond Tuesday, or whether the hot spell begins to ease later in the week. The June 20 update leaves open the possibility of further changes if the forecast shifts.

For now, the warning captures a heat event that started with southern England under alert and has since widened to cover more of England and Wales, with health officials and forecasters warning that the effects could be felt well beyond the thermometer readings.