Heat waves are growing hotter and more prolonged. What's driving extreme temperatures?
Briefly

Death Valley, home of the world's hottest recorded temperature, was flirting with its own record as thermometers recorded a temperature of 128 degrees for multiple days in a row.
The direct source of almost all heat waves is a high-pressure system in the upper atmosphere, suppressing cloud formation and trapping hot air at the surface.
The 'heat dome' phenomenon, exacerbated by climate change, leads to prolonged and intensified heat waves by trapping hot air at the surface.
Greenhouse gases emitted by human activities contribute to the intensification of heat waves by preventing thermal radiation from escaping, leading to warmer nights.
Read at Los Angeles Times
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