September was hottest on record by 'extraordinary' margin: EU monitor

Last month was the hottest September on record by an "extraordinary" margin as the world flirts dangerously with breaching a key warming limit, the EU climate monitor said on Thursday. Much of the world sweltered through unseasonably warm weather in September, in a year expected to be the hottest in human history and after the warmest-ever global temperatures during the Northern Hemisphere summer.