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This year has been the hottest on record globally, with many areas around the world experiencing extremely hot conditions this summer. According to Diffenbaugh et al., extreme heat waves can be expected to be a more common occurrence over the next 30 years as greenhouse gas concentrations continue to rise.

The scientists used a new high-resolution climate model simulation for the United States and compared their results with multiple global climate models. The models showed that there are likely to be increasingly frequent hot extremes during the next 3 decades, including more record-breaking heat waves and hot seasons in many parts of the United States, especially in the west. These hot conditions would pose a threat not only to the environment but also to human health.