Extreme Weather refers to weather events that can have devastating impacts on the environment and human life. These events are unusual and often short-lived, but can be devastating to communities. Extreme weather events include droughts, heatwaves, wildfires, floods, tornados, hurricanes, etc. Global warming is a key factor in the severity of these events. As the Earth's average temperature increases, the frequency of extreme weather increases as well. Read below to learn more about extreme weather events, and the potential causes of them.
As temperatures rise, droughts are becoming more common and more severe. Hotter temperatures mean higher evaporation rates. This leads to massive loss of vegetation and the drying up of smaller bodies of water such as lakes ponds and even small rivers. This desertification of the Earth means many farmers are struggling to grow crops, impacting food security all over the world. In Romania, about 70% of the land is in a process of desertification.
Warmer temperatures are often correlated with droughts, however, they also correlate with an increase in water vapor in the air. Global warming has led to a warmer atmosphere that can hold more water vapor in the air and lead to more intense rainfall and snowfall according to NASA. Areas where intense precipitation occurs are subject to flooding. Precipitation can exceed drainage system capacities leading to lots of damage. Coasts are hit the hardest with the combination of intense precipitation, and rising sea levels. "High tides are becoming even higher", increasing the chance of flooding. As sea levels rise, coastal cities are at risk of being submerged.
The term Extreme Wildfire does not have a clear definition, however, it is often used to describe a fire that spreads quickly, causes mass destruction, and leads to fatalities among a large number of humans and or animals. Extreme wildfires have become "more frequent, more intense, and larger" according to NASA. Droughts are causing vegetation to dry up, allowing for fires to spread faster and grow quicker. Warmer night time temperatures also contribute to the higher presence of extreme wildfires. Although wildfire frequency has not increased, the likelihood of a wildfire being categorized as extreme has increased due to human-caused climate change.
Ocean temperatures are on the rise, boosting the power of tropical storms and hurricanes. Max wind speeds of hurricanes between 2019 and 2023 have increased by 30 km/h on average as a result of warmer waters. Warmer air hold's more moisture because of increased evaporation rates. More moisture in the air leads to greater rainfall, further boosting the severity of storms. Human impact may not be contributing to more tropical storms, but there is high confidence that it is increasing the severity of these storms.
Citations
https://science.nasa.gov/climate-change/extreme-weather/
https://ibn.idsi.md/sites/default/files/imag_file/134-139_16.pdf
https://phys.org/news/2024-08-years-romanian-farms-wilt-drought.html
https://www.bbc.com/news/world-us-canada-42251921
https://science.nasa.gov/wildfires-and-climate-change/
https://www.edf.org/climate/heres-how-climate-change-affects-wildfires