'Highest temperature on Earth' as Death Valley, US hits 54.4C
What could be the highest temperature ever reliably recorded on Earth - 130F (54.4C) - may have been reached in Death Valley National Park, California, APA reports citing BBC.
The recording is being verified by the US National Weather Service.
It comes amid a heatwave on the US's west coast, where temperatures are forecast to rise further this week.
The scorching conditions have led to two days of blackouts in California, after a power plant malfunctioned on Saturday.
"It's an oppressive heat and it's in your face," Brandi Stewart, who works at Death Valley National Park, told the BBC.
Ms Stewart has lived and worked at the national park on and off for five years. She spends a lot of her time indoors in August because it's simply too uncomfortable to be outside.
"When you walk outside it's like being hit in the face with a bunch of hairdryers," she said. "You feel the heat and it's like walking into an oven and the heat is just all around you."
What were the previous records?
Sunday's reading was recorded in Furnace Creek in Death Valley.
Before this, the highest temperature reliably recorded on Earth was 129.2F (54C) - also in Death Valley in 2013.
A higher reading of 134F, or 56.6C a century earlier, also in Death Valley, is disputed. It is believed by some modern weather experts to have been erroneous, along with several other searing temperatures recorded that summer.
According to a 2016 analysis from weather historian Christopher Burt, other temperatures in the region recorded in 1913 do not corroborate the Death Valley reading.
Another record temperature for the planet - 131F, or 55C - was recorded in Tunisia in 1931, but Mr Burt said this reading, as well as others recorded in Africa during the colonial era, had "serious credibility issues".
What about the heatwave?
The current heatwave stretches from Arizona in the south-west, up the coast to Washington state in the north-west.
It is expected to hit its peak on Monday and Tuesday, before temperatures start to drop later in the week. However, the sweltering heat will continue for at least another 10 days.
As temperatures soared in California, a large "firenado" was observed on Saturday in Lassen County.
California's Independent System Operator (CISO), which manages the state's power, has declared a Stage 3 Emergency, meaning "when demand [for electricity] begins to outpace supply".
Because so much of the region's power relies on solar and wind energy, and because people use their electricity for air conditioning, during heatwaves the power grid becomes strained and is at risk of completely malfunctioning.
In order to manage the state's demand for power and prevent a complete shutdown, officials are using scheduled rolling blackouts to control and conserve energy.
What are the effects of extreme heat?
Officials define extreme heat as a period of two to three days of high heat and humidity, with temperatures above 90F (32C).
US public health body the Centers for Disease Control and Prevention (CDC) says heatwaves have killed more people on average than any other extreme weather event in the country.
The immediate effects of heatwaves on the human body are heat cramps, dehydration and even potentially fatal heat strokes.
However, extreme heat can also exacerbate pre-existing health conditions, including respiratory diseases, heart conditions and kidney disorders, the World Health Organization (WHO) says.
It can affect infrastructure, too. As well as straining power grids and causing blackouts, extreme heat can ground planes, melt roads, and cause the inside of cars to overheat to dangerous levels.
Heatwaves can also have a severe impact on agriculture - either by causing vegetables to wilt and die, or by encouraging the spread of plant diseases.
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