Diseases, Conditions, Syndromes

Rising number of Americans sent to ERs last year during heat waves

As climate change threatens another long hot summer for Americans, new data shows last summer's record-breaking temperatures sent a rising number of people to emergency departments. The findings are published in the journal ...

Climate change

Climate change is any long-term change in the statistics of weather over periods of time that range from decades to millions of years. It can express itself as a change in the mean weather conditions, the probability of extreme conditions, or in any other part of the statistical distribution of weather. Climate change may occur in a specific region, or across the whole Earth.

In recent usage, especially in the context of environmental policy, climate change usually refers to changes in modern climate (see global warming). For information on temperature measurements over various periods, and the data sources available, see temperature record. For attribution of climate change over the past century, see attribution of recent climate change.

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