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Heat Waves Strike Faster Than Ever
13 Oct
Summary
- Land heat waves are appearing earlier and peaking faster globally.
- Heat wave season has extended by 39 days over the past 45 years.
- Crop exposure to heat waves during critical stages has increased.
Land-based heat waves globally are now initiating earlier and reaching peak intensity more rapidly than in previous decades. Research published in Nature Climate Change reveals a significant trend towards faster onset, with the first heat waves advancing by about 3.3 days per decade over the past 45 years.
The overall heat wave season has consequently lengthened by approximately 8.7 days per decade. This means the period where land areas experience elevated temperatures has expanded by about 39 days. These changes are particularly pronounced in arid regions, affecting ecosystems and agriculture.
Crops are increasingly vulnerable, with a 1.6% to 13.3% rise in exposure to heat waves during critical growth stages between 2001-2023 compared to 1979-2000. This necessitates enhanced timeliness in heat wave monitoring, warning systems, and risk management actions to adapt to these accelerating climate impacts.
