Heavy Rain After A Heatwave – How Does It Happen? And Why Is It So Bad?
Extreme weather events like heatwaves and heavy rainfall are becoming more frequent, intense, and prolonged as the planet warms. Thunderstorms, lightning, and floods are expected throughout the UK due to heavy rain after a heatwave.
Jaya MckeownAug 19, 20220 Shares211 Views
Thunderstorms, lightning, and floods are expected throughout the UK due to heavy rain after a heatwave.
According to the Environment Agency of England, the Scottish Environment Protection Agency, and Natural Resources Wales, there are now 33 flood warnings in effect throughout the United Kingdom.
Flood warnings have been issued for most of Scotland, and there are fears that the Thames may overflow and cause chaos in London.
Sadiq Khan, the Mayor of London, has said that transport for London intends to "address any consequences of flash flooding", following last year's flooding of the Tube and other networks.
A heatwave is a prolonged period of hot weather compared to the area's typical conditions at that time of year, which may be accompanied by excessive humidity.
Heatwaves are most likely in the summer when high pressure builds up across a large region.
High-pressure systems are slow-moving and may last for days or weeks over a given region.
Hot days are becoming hotter and more common worldwide, whereas cold days are becoming fewer and further between.
Daily record high temperatures have happened twice as often as record low temperatures over the continental United States in the last decade, up from a near 1:1 ratio in the 1950s.
Heat waves are growing more prevalent, and violent heat waves are becoming more frequent in the United States West.
However, the 1930s still hold the record for the number of heat waves in various sections of the nation (primarily related to the Dust Bowl, which was exacerbated by the conversion of prairie to farmland).
Suppose greenhouse gas emissions are not significantly reduced.
In that case, daily high and low temperatures will rise by at least 5 degrees Fahrenheit by mid-century, rising to 10 degrees Fahrenheit by the late century in most locations.
The National Climate Assessment predicts 20–30 extra days with temperatures over 90 degrees Fahrenheit in most places by mid-century.
When paired with excessive humidity, heat waves become even more deadly.
The heat index measures the combination of temperature and humidity.
Compared to the end of the twentieth century, new research predicts that the yearly number of days with a heat index of over 100 degrees Fahrenheit will double, and days with a heat index exceeding 105 degrees Fahrenheit will treble.
Heat waves may enhance the likelihood of other sorts of catastrophes. Heat may worsen drought, and hot, dry conditions can lead to wildfires.
Buildings, roads, and infrastructure absorb heat, causing temperatures in metropolitan areas to be 1 to 7 degrees Fahrenheit higher than in surrounding regions—a phenomenon known as the urban heat island effect.
This effect is most apparent during the day, but overnight slow heat release from infrastructure (or an atmospheric heat island) may keep cities much hotter than surrounding places.
Rising temperatures in the United States endanger people, ecosystems, and the economy.
Extreme heat is one of the major causes of weather-related mortality in the United States, killing more than 600 people each year on average from 1999 to 2009, more than all other effects combined (excluding hurricanes).
Heat-related sickness and death are most frequently caused by high humidity and rising nighttime temperatures.
When there is no relief from the heat at night, it may create pain and health concerns, particularly for those who do not have access to cooling, who are frequently low-income individuals.
Other categories at risk for heat stress include elderly persons, newborns and children, those with chronic health concerns, and outdoor laborers.
Hot days are also linked to increased heat-related ailments, such as cardiovascular and respiratory difficulties and renal disease.
Extreme temperatures have an impact on air quality.
Hot and sunny days may boost the formation of ground-level ozone.
This dangerous pollutant is the principal component of smog and can impair the respiratory system, especially in individuals with asthma.
Furthermore, increased air conditioning usage necessitates more power, which, depending on the source, releases different forms of pollutants, including particles, which influence air quality.
These increases in ozone and particle matter may pose substantial dangers to humans, especially the same vulnerable populations listed above that are directly harmed by heat.
Warmer temperatures impact several parts of the energy system in the United States, including production, transmission, and demand.
While greater summer temperatures boost cooling demand, they may also reduce transmission line capacity, potentially leading to electrical dependability difficulties such as rolling blackouts during heat waves.
Although milder winters would lower the demand for heating, modeling indicates that overall U.S. energy use will rise in a warmer future.
Furthermore, when rivers and lakes warm, their ability to absorb waste heat from power plants diminishes.
This reduces the thermal efficiency of power generation, making it difficult for power plants to meet environmental rules governing the temperature of their cooling water.