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    Caution needed - Extreme heat takes hold

12:53
23 June 2026

Caution needed
Extreme heat takes hold

Split temperature maps of the UK for Wednesday 24.06 and Thursday 25.06 showing intensifying heat across Britain, with temperatures rising from 38°C near London on Wednesday to 37°C on Thursday, and a central heat warning symbol highlighting widespread extreme warmth.
Heat builds during the week, possibly hitting 40 °C locally.

Extreme heat will grip the UK this week, with rare heat warnings in force in parts of the country.

Amber extreme heat warnings are in effect from Monday into Tuesday, before a red warning covers parts of central England into Wales. This becomes just the second ever red extreme heat warning following the first in the historic heatwave of July 2022.

Daily highs are expected to exceed 37 °C even in shaded areas, and rising to around 40 °C in places, threatening the all-time UK heat record of 40.3 °C. Increasing humidity will also make conditions more oppressive along with tropical nights for some.

In Ireland, yellow heat warnings are active from Tuesday, after a rather overcast Monday it is turning sunnier and hotter from Tuesday onwards.

Later in the week, Thursday could mark the peak of the heat. However, there is also potential for widespread thunderstorms across the north of England into Scotland.

Temperatures will dip again from Friday, but it will remain warm through the weekend.

London

Tu
20
33
We
22
34
Th
20
32
Fr
23
34
Sa
22
31
Su
19
26
Mo
16
27
Tu
19
28
We
18
27
Th
18
29
Fr
18
30
Sa
19
30
Su
19
27
Mo
16
24
Max (°C)
Min (°C)
moreless

Manchester

Tu
17
31
We
18
30
Th
19
32
Fr
22
30
Sa
18
27
Su
18
23
Mo
14
22
Tu
15
24
We
16
23
Th
13
22
Fr
14
23
Sa
14
22
Su
14
22
Mo
14
22
Max (°C)
Min (°C)
moreless

Dublin

Tu
14
26
We
16
20
Th
16
25
Fr
19
25
Sa
18
21
Su
15
20
Mo
12
20
Tu
13
21
We
13
21
Th
11
20
Fr
11
19
Sa
12
19
Su
11
20
Mo
12
20
Max (°C)
Min (°C)
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Edinburgh

Tu
14
27
We
15
24
Th
14
20
Fr
15
18
Sa
15
23
Su
16
20
Mo
13
20
Tu
13
21
We
14
21
Th
10
19
Fr
11
19
Sa
13
19
Su
12
20
Mo
12
20
Max (°C)
Min (°C)
moreless

Cardiff

Tu
20
31
We
20
33
Th
23
34
Fr
21
26
Sa
17
26
Su
17
22
Mo
14
22
Tu
16
24
We
16
24
Th
15
23
Fr
15
23
Sa
15
23
Su
15
22
Mo
15
22
Max (°C)
Min (°C)
moreless
Weather & Radar editorial team
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