UKHSA Issues Yellow Heat-Health Alert for London as Temperatures to Hit 31C

The UK Health Security Agency (UKHSA) has issued a yellow heat-health alert for London as the capital braces for its first significant heatwave of the year, with temperatures forecast to reach 31C early next week.

Alert Details and Duration

The alert, updated on Wednesday morning, comes into force from 9am on Friday 22 May and remains in place until 5pm on Wednesday 27 May. The UKHSA stated there is a “medium likelihood” of low-level impacts across health and social care services during the warm conditions.

The agency warned that vulnerable individuals could face an increased risk to life, while health services may see higher demand. There is also an increased potential for indoor environments to become very warm during the prolonged spell of heat.

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Temperature Forecast

Forecasters say temperatures in London will rise steadily through the weekend before peaking at around 31C on Sunday and Monday. Conditions are expected to remain largely dry and sunny, although there is a chance of heavy thundery showers on Saturday.

The Met Office noted that Thursday would become “warm or very warm” with sunny spells developing after early cloud clears. Looking ahead to the weekend, forecasters said temperatures could become “perhaps hot” with continued sunshine for many areas.

BBC London’s forecast also points to very warm and settled conditions from Friday through Sunday, with high pressure dominating and “plenty of sunshine” expected across the capital.

Change in Weather Pattern

The warmer weather marks a sharp change from the cool and unsettled conditions experienced across much of the UK in recent days. Meteorologists say Friday could bring the warmest day of the year so far in parts of southeast England.

Met Office Deputy Chief Forecaster Tony Wisson said the coming weather would feel like “a marked contrast from recent days”, with warm and settled conditions for many people through the Bank Holiday weekend.

Possible Thunderstorms

Despite the heat, forecasters say some areas could still see outbreaks of thundery rain into Saturday before high pressure re-establishes itself into Sunday and early next week.

Economic Impact

The warmer conditions are also expected to provide a boost for tourism and hospitality businesses over the Bank Holiday period, with attractions, hotels and coastal destinations likely to benefit from increased visitor numbers.