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Migration Dialogue provides timely, factual and nonpartisan information and analysis of international migration issues through five major activities: the newsletters Migration News and Rural Migration News, Changing Face and other Research & Seminars, and the Sloan West Coast Program on Science and Engineering Workers.
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The year 2015 was the hottest on record, in part because an El Nino weather pattern, one of the largest in a century, is releasing an immense amount of heat from the Pacific Ocean into the atmosphere. The last powerful El Nino was in 1998.
The average temperature in the lower 48 states was 54.4F in 2015, and 2.4F above the 20th century average. In the US, December was warm in much of the eastern US, and there was heavy rain that led to flooding.