Global Extreme Heatwave 2021: Without human-induced climate change, it would have been almost impossible to hit such record-breaking mean June temperatures in the Western United States as the chances of natural occurrence is once every tens of thousands of years. In the present-day climate getting an extremely hot June is common and is likely to occur twice in three decades.
Human-induced Climate Change Responsible for Global Extreme Heatwave 2021
New Delhi (ABC Live India): Global Extreme Heatwave 2021:An
exceptional and dangerous heatwave is baking the Northwestern USA and Western
Canada in areas that are more synonymous with the cold. Temperatures have
reached more than 45.0°C on consecutive days, with extremely warm nights in
event is having multiple major impacts: heat stress in people, animals
and vegetation; air quality (pollutants due to hot stable air); forest fire
risk; the possibility of landslides caused by glacier melting in mountains; damages
and malfunctioning of infrastructure and transport systems not prepared for
such high temperatures; and many other social and economic risks.
National and local meteorological services have issued many heat
warnings and advisories and it is to be hoped that heat-health early warning
services will limit the death toll.
So many records have been broken that it is difficult to keep
The all-time Canadian record was broken on Sunday, with Lytton
in British Columbia recording 46.6°C (1.6°C higher than the previous record set
on 5 July 1937). Less than 24 hours later, Lytton broke this record again,
reaching 47.9°C on Monday. It then broke it for a third time on 29 June with a
temperature of 49.6°C.
The temperature record surpassed Las Vegas' all-time record high
of 117°F/47.2°C. British. The heat is more typical of summer temperatures in
the Middle East than in a province that is home to the Rocky Mountains and
Glacier National Park. There is a consequent risk of high glacier melt.
The province of British Columbia broke 43 all-time records as of
28 June, with more expected to tumble.
cannot describe this historic event,” tweeted Environment and Climate Change
Canada British Colombia.
Armel Castellan is a meteorologist with Environment and Climate
Change Canada. He said: We are not done with this yet.
“The North West Territories have recorded their all-time highest
temperatures not just in June, but any point in the year. We are setting
records that have no business in being set so early in the season.”
“We have had many days of this in a row and each morning we wake
up to a higher temperature. This is what is dangerous and it is affecting
people throughout many days where they are dehydrated and we have had many days
where the temperature is higher than the day before,” Mr Castellan said.
“Overnight lows being higher than our average daytime highs for
late June is a really big deal. Our bodies need to cool off and recover before
taking on another day of high temperatures. Another thing to think about is the
“Fewer than 40 per cent of homes have the air conditioning on the
coast, people are having to go to libraries and shopping malls to find a couple
of hours of air conditioning. I have been sleeping in a tent to get some
respite from the heat,” said Mr Castellan.
“Just a historic stretch of record-shattering temperatures in
the Northwest! #HeatWave2021,”
said the U.S. National Weather Service.
Seattle set a new all-time record at 104°F (40°C) on Sunday and
broke that on Monday with 107°F (41.7°C) Portland broke the record twice -
108°F (42°C) on Saturday 112°F (44.4°C) on Sunday, according to the US National
Weather Service. Many other station records tumbled on Monday.
The heat is being caused by a combination of a significant
atmospheric blocking pattern which has led to a heat dome, with low pressure
either side and which is not being moved along by the jet stream.
This heatwave comes on the heels of another historic heatwave
less than two weeks ago that baked the U.S. Desert Southwest and California
with hundreds of record highs.
parts of the northern hemisphere are already experiencing exceptional early hot
summer conditions extending from north Africa, Arabian Peninsula, eastern
Europe, Iran and the north-western Indian continent. Maximum daily temperatures
exceeded 45°C in several locations and reaching 50’s in the Sahara. Western Libya saw temperatures more than
10°C above average for June.
Western Russia and areas around the Caspian Sea have also seen
unusually high temperatures due to the continued presence of a large area of
high pressure. In parts of the region including Moscow, temperatures are
expected to reach the mid-30s°C by day, remaining above 20°C by night. Areas
nearer the Caspian Sea are expected to experience temperatures reaching the mid
40s°C and remaining above 25°C at night. It is likely that some all-time
temperature records will be set during this heatwave.
Human-induced Climate Change
early summer hot weather conditions are taking place in human-induced climate
change background, with global temperatures, are already 1.2°C higher than the
“Heatwaves are becoming more frequent and intense as greenhouse
gas concentrations lead to a rise in global temperatures. We are also
noticing that they are starting earlier and ending later and are taking an increasing toll on human health,” said Omar Baddour, Head of WMO’s Climate
Monitoring and Policy Division.
Nikos Christidis is a climate scientist with the UK’s Met
Office. He said: “Without human-induced climate change, it would have been
almost impossible to hit such record-breaking mean June temperatures in the
Western United States as the chances of natural occurrence is once every tens
of thousands of years. In the present-day climate getting an extremely hot
June is common and is likely to occur twice in three decades. However, an
analysis from many computer models suggests that by the end of the century
these extreme temperatures are more likely than not. Human influence is
estimated to have increased the likelihood of a new record several thousand
times,” he said.
The Intergovernmental Panel on Climate Change Special Report on
Global Warming of 1.5°C contained information on climate change and human
Climate-related risks to health, livelihoods, food security,
water supply, human security, and economic growth are projected to increase
with global warming of 1.5 °C and increase further with 2 °C. Limiting warming
to 1.5 °C rather than 2 °C could result in 420 million fewer people being
exposed to severe heatwaves, it said.
In 2018, vulnerable people over the age of 65 experienced a record 220 million more heatwave exposures, than the average for the baseline of 1986–2005, according to WMO’s report on the State of the Global Climate in 2019.