In just 30 years, cities around the world will face dramatically higher risks from extreme heat, coastal flooding, power blackouts and shortages of food and water unless climate-changing emissions are curbed, urban researchers warned Tuesday. Today, for instance, over 200 million people in 350 cities ...

As Germany and Spain sweated and London sweltered through its hottest July day on record in the first week of this month, scientists said it is "virtually certain" that climate change is increasing the likelihood of such heat waves in Europe. In real-time data analysis ...