Britain's weather service on Tuesday issued an amber 'Extreme Heat' warning for parts of England and Wales, with no respite in sight from hot dry conditions that have sparked fires, broken temperature records and strained the nation's infrastructure.
The amber warning — the second-most severe after red — will be in place from Thursday through to the end of Sunday and means that people vulnerable to extreme heat could face adverse health effects, the UK Met Office said.
Temperatures are expected to peak at 35 degrees Celsius (95 degrees Fahrenheit) on Friday and may hit 36 degrees Celsius in some places on Saturday.
The warning follows the driest July for England since 1935, when temperatures rose above 40 degrees Celsius for the first time, turning a renewed spotlight to the impacts of climate change.
Other European nations have also faced a scorching heatwave in recent weeks with temperatures often exceeding 40 degrees Celsius.
Britain, which is less used to such high temperatures, has struggled to cope.
July's heatwave caused power outages, damaged airport runways, buckled rail tracks and ignited dozens of blazes in London, where the fire brigade faced its busiest week since World War II.
Several water companies have since imposed usage restrictions and supermarkets have limited sales of disposable BBQs that firefighters warn can set light to tinder-dry grass. Ambulance services have received hundreds of calls from patients facing breathing difficulties, dizziness and fainting.
The amber warning, which follows Britain's first-ever red 'Extreme Heat' warning in July, covers much of the southern half of England and parts of eastern Wales.
Scientists have said the July heatwave was made at least 10 times more likely because of climate change.
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