One heat wave Unprecedented progress on North America Since last week, resulting in record temperatures in parts of United State e do Canada It caused at least 134 deaths. Officials expect temperatures to remain exceptionally high for another week. Below is the most important information about this phenomenon.
What causes a heat wave?
Heat waves start when high pressure moves in the atmosphere and pushes warm air toward the ground. This air heats up more when compressed.
The Earth’s high pressure system expands vertically, forcing other weather systems to change course. It even reduces wind and cloud cover, making the air more stifled. This is also the reason why a heat wave may extend over an area for several days or more.
What is a thermal dome?
As the soil warms, it loses moisture, which makes heating easier. In drought-stricken regions such as the western United States, there is enough heat for the high-pressure system to persist.
As the trapped heat continues to heat up, the system acts as a lid on a saucepan – called a “heat dome”. In the Pacific Northwest, heat and drought work hand in hand, exacerbating the problem and pushing temperatures to record levels.
What places in North America are experiencing a heat wave?
Salem, in the US state, was one of the hottest cities on the continent on Monday OregonWhere the temperature reached 47 degrees Celsius. Canada set a record high on Tuesday, 29th, when thermometers in Lytton, British Columbia, read 49.5 degrees.
The northeastern United States, under a separate climate regime, is also in the midst of a three-day heat wave that is expected to end on Thursday. The US Meteorological Service reported that Boston recorded 36 degrees on Monday, surpassing the all-time record.
Why is it hotter than normal in North America?
it is known that The world has warmed by more than 1 degree since 1900And the pace of global warming has accelerated in recent decades. A warmer baseline contributes to extreme weather events and helps make hot flashes more frequent, longer and more intense.
When will the heat wave end?
Meteorologists say temperatures will remain exceptionally high next week in the Pacific Northwest.