A red warning for extreme heat has been issued for the first time for England on Monday and Tuesday, when temperatures could reach 40C for the first time.
The Met Office is warning of “an exceptional hot spell […] leading to widespread impacts on people and infrastructure”.
“Population-wide adverse health effects” are expected, “not limited to those most vulnerable to extreme heat”.
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Elsewhere, the existing amber warning has been extended to the rest of England, Wales, and parts of Scotland from Monday.
The Met Office has said the red warning means “adverse health effects” may be experienced and will not be limited to “those most vulnerable to extreme heat”.
They added the weather could also lead to “serious illness or danger to life”.
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The Met Office added “substantial changes in working practices and daily routines will be required”.
The national weather service also warns there is a “high risk of failure of heat-sensitive systems and equipment, potentially leading to localised loss of power and essential services, such as water or mobile phone services”.
There will also be “significantly more people visiting coastal areas, lakes and rivers, leading to an increased risk of water safety incidents”.
The public has also been warned to expect delays on roads, along with delays and cancellations to rail and air travel.
