{"id":32424,"date":"2022-12-29T02:53:00","date_gmt":"2022-12-29T02:53:00","guid":{"rendered":"https:\/\/www.lifeandnews.com\/articles\/?p=32424"},"modified":"2022-12-30T15:27:14","modified_gmt":"2022-12-30T15:27:14","slug":"2022s-us-climate-disasters-from-storms-and-floods-to-heat-waves-and-droughts","status":"publish","type":"post","link":"https:\/\/www.lifeandnews.com\/articles\/2022s-us-climate-disasters-from-storms-and-floods-to-heat-waves-and-droughts\/","title":{"rendered":"2022\u2019s US climate disasters, from storms and floods to heat waves and\u00a0droughts"},"content":{"rendered":"\n

Shuang-Ye Wu<\/a>, University of Dayton<\/a><\/em><\/p>\n\n\n\n

The year 2022 will be remembered across the U.S. for its devastating flooding and storms \u2013 and also for its extreme heat waves and droughts.<\/p>\n\n\n\n

By October, the U.S. had already seen 15 disasters<\/a> causing more than US$1 billion in damage each, well above the average. The year started and ended with widespread severe winter storms from Texas to Maine, affecting tens of million of people and causing significant damages. Then, March set the record<\/a> for the most reported tornadoes<\/a> in the month \u2013 233.<\/p>\n\n\n\n

During a period of five weeks over the summer, five 1,000-year rainfall events<\/a> occurred in St. Louis<\/a>, eastern Kentucky<\/a>, southern Illinois<\/a>, California\u2019s Death Valley<\/a> and Dallas<\/a>, causing devastating and sometimes deadly flash floods. Severe flooding in Mississippi knocked out Jackson\u2019s troubled water supply<\/a> for weeks. A historic flood in Montana<\/a>, brought on by heavy rain and melting snow, forced large areas of Yellowstone National Park to be evacuated.<\/p>\n\n\n\n

In the fall, hurricanes Ian<\/a> and Fiona<\/a> deluged Florida and Puerto Rico with over 2 feet (6.6 meters) of rain in areas and deadly, destructive storm surge. Ian became one of the most expensive<\/a> hurricanes in U.S. history. And a typhoon pounded<\/a> 1,000 miles (1,600 km) of the Alaska coast.<\/p>\n\n\n\n

\"A
Flash flooding swept through mountain valleys in eastern Kentucky in July 2022, killing more than three dozen people. It was one of several destructive flash floods. Seth Herald\/AFP via Getty Images<\/a><\/figcaption><\/figure>\n\n\n\n

While too much rainfall threatened some regions, extreme heat and too little precipitation worsened risks elsewhere.<\/p>\n\n\n\n

Persistent heat waves lingered over many parts of the country, setting temperature records. Wildfires raged in Arizona<\/a> and New Mexico<\/a> on the background of a megadrought in the Southwestern U.S.<\/a> more severe than anything the region has experienced in at least 1,200 years.<\/p>\n\n\n\n

Drought also left the Mississippi River so low<\/a> near Memphis in the fall that barges couldn\u2019t get through without additional dredging and upstream water releases. That snarled grain shipping during the critical harvest period<\/a>. Along the Colorado River, officials discussed even tighter water use restrictions as water levels neared dangerously low levels<\/a> in the major reservoirs.<\/p>\n\n\n\n

\"Map<\/a>
The U.S. had been hit with 15 climate and weather disasters costing over US$1 billion each by the end of September 2022. The map shows disasters from January through September. NCEI\/NOAA<\/a><\/figcaption><\/figure>\n\n\n\n

The United States was hardly alone in its climate disasters.<\/p>\n\n\n\n

In Pakistan, record monsoon rains<\/a> inundated more than one-third of the country, killing over 1,500 people. In India<\/a> and China<\/a>, prolonged heat waves and droughts dried up rivers, disrupted power grids and threatened food security for billions of people. Widespread flooding and mudslides brought on by torrential rains also killed hundreds of people in South Africa<\/a>, Brazil<\/a> and Nigeria<\/a>.<\/p>\n\n\n\n

In Europe, heat waves set record temperatures in Britain<\/a> and other parts of the continent, leading to severe droughts, low river flows that slowed shipping<\/a>, and wildfires in many parts of the continent. Much of East Africa is still in the grips of a multiyear drought \u2013 the worst in over 40 years<\/a>, according to the United Nations \u2013 leaving millions of people vulnerable to food shortages and starvation.<\/p>\n\n\n\n

This isn\u2019t just a freak year: Such extreme events are occurring with increasing frequency and intensity.<\/p>\n\n\n\n

Climate change is intensifying these disasters<\/h2>\n\n\n\n

The most recent global climate assessment<\/a> from the United Nations Intergovernmental Panel on Climate Change found significant increases in both the frequency and intensity of extreme temperature and precipitation events, leading to more droughts and floods.<\/p>\n\n\n\n

Extreme flooding and droughts are also getting deadlier and more expensive<\/a>, despite an improving capacity to manage climate risks, a study published in 2022 found. Part of the reason is that today\u2019s extreme events, enhanced by climate change, often exceed communities\u2019 management capabilities.<\/p>\n\n\n\n

\"A
A family had to be airlifted from their home in eastern Kentucky after it was surrounded by floodwater in July 2022. Michael Swensen\/Getty Images<\/a><\/figcaption><\/figure>\n\n\n\n

Extreme events, by definition, occur rarely. A 100-year flood has a 1% chance of happening in any given year. So when such events occur with increasing frequency and intensity, they are a clear indication of a changing climate state.<\/p>\n\n\n\n

Climate models showed these risks were coming<\/h2>\n\n\n\n

Much of this is well understood and consistently reproduced by climate models.<\/p>\n\n\n\n

As the climate warms, a shift in temperature distribution leads to more extremes. For example, globally, a 1 degree Celsius increase in annual average temperature is associated with a 1.2 C to 1.9 C (2.1 Fahrenheit to 3.4 F) increase in the annual maximum temperature<\/a>.<\/p>\n\n\n\n

\"A
Heat waves, like the heat dome over the South in July 2022, can hit outdoor workers especially hard. Brandon Bell\/Getty Images<\/a><\/figcaption><\/figure>\n\n\n\n

In addition, global warming leads to changes in how the atmosphere and ocean move. The temperature difference between the equator and the poles is the driving force for global wind. As the polar regions warm at much higher rates than the equator, the reduced temperature difference causes a weakening of global winds and leads to a more meandering jet stream<\/a>.<\/p>\n\n\n\n

Some of these changes can create conditions such as persistent high-pressure systems and atmospheric blocking that bring more intense heat waves. The heat domes<\/a> over the Southern Plains and South in June and in the West in September were both examples.<\/p>\n\n\n\n

Warming can be further amplified by positive feedbacks.<\/p>\n\n\n\n

For example, higher temperatures tend to dry out the soil, and less soil moisture reduces the land\u2019s heat capacity, making it easier to heat up. More frequent and persistent heat waves lead to excessive evaporation, combined with decreased precipitation in some regions, causing more severe droughts and more frequent wildfires.<\/p>\n\n\n\n

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