Global
warming causes temperature extremes. We’ve seen colder than normal spells in
winters here in the U.S. East Coast, and hotter than normal summers. That’s how
global warming affects the planet. In the last weekend of June, residents of
the Northwestern United States, and southwestern Canada broke record high
temperatures with scorching heat in the 110s Fahrenheit! In today’s blog you’ll
read about the Pacific Northwest, and southwestern Canada (courtesy of a BBC
News article) and how an Omega Block made it happen.
(Image: What an "Omega Block" looks like in the jet stream, that brought record heat to the Pacific Northwest. Credit: CBS News)
WHAT IS AN “OMEGA BLOCK”?
– It’s
an area of dangerously hot air in the shape of the Greek Letter “Omega.” In
this case, the jet stream has trapped a ridge of high pressure (that's the heat
dome) over the Pacific Northwest, creating a block in the atmosphere that
prevents the weather system from moving on.
RECORDS SHATTER IN U.S.
PACIFIC NORTHWEST - Before the weekend of June 26-27, the record high for the city of Seattle, Washington was 107
degrees in 1981. Seattle reached 108 degrees Monday, June 28, beating
its prior record of 104 degrees reached Saturday – its all time record
high temperature, ever! Portland, Oregon recorded its all-time
high temperature of 116, setting new record for third day in a row. Portland hit 116 degrees Monday afternoon, June 28, 2021,
setting a new record high temperature for the third day in a row, according to the
National Weather Service.
Canada weather: Dozens
dead as heatwave shatters records
BBC
NEWS June 30, 2021 https://www.bbc.com/news/world-us-canada-57654133
Dozens
of people have died in Canada amid an unprecedented heatwave that has smashed
temperature records. Police in the Vancouver area have responded to more than
130 sudden deaths since Friday. Most were elderly or had underlying health
conditions, with heat often a contributing factor.
Canada
broke its temperature record for a third straight day on Tuesday - 49.6C
(121.3F) in Lytton, British Columbia.
The
U.S. Pacific Northwest has also seen record highs - and a number of fatalities.
Experts
say climate change is expected to increase the frequency of extreme weather
events, such as heatwaves. However, linking any single event to global warming
is complicated.
(Image: Record high temperatures in the western and Eastern U.S. the weekend of June 27-28. Credit: CNN)
WHAT CAUSED IT?
The
heat over western parts of Canada and the US has been caused by a dome of
static high-pressure hot air stretching from California to the Arctic
territories. Temperatures have been easing in coastal areas but there is not
much respite for inland regions.
WHAT WAS THE PREVIOUS
HIGH? Before Sunday, temperatures in Canada had
never passed 45 Celsius (113 Fahrenheit) .
MANY HEAT DEATHS IN
VANCOUVER
- In Vancouver alone, heat is believed to have been a contributing factor in
the unexpected deaths of 65 people since Friday, June 25. "I've been a
police officer for 15 years and I've never experienced the volume of sudden
deaths that have come in in such a short period of time," police sergeant
Steve Addison said. Three or four a day is the normal number.
FINDING THE DEAD IN
HOUSES
- He said people were arriving at
relatives' homes and "finding them deceased". British Columbia Chief Coroner Lisa Lapointe
said 100 more deaths than normal had been reported in the period from Friday to
Monday.
NORTHEAST OF SEATTLE,
TINY CANADIAN TOWN SHATTERED HEAT RECORDS -
The
tiny village of Lytton, about 155 miles (250 km) east of Vancouver - and not
much further south than London - has recorded all of Canada's recent record
highs. Canada temperature reaches record
49.6C.
NO AIR CONDITIONING - Many homes in British
Columbia do not have air conditioning as temperatures are usually far milder
during the summer months.
HEAT WARNINGS - The country's weather
service, Environment Canada, has issued heat warnings for the provinces of
British Columbia and Alberta, along with areas of Saskatchewan, the Northwest
Territories and Manitoba.