A favorite vacation option may be at risk because of rising temperatures. Even those sticking with their summer plans agree: More air conditioning would help.

An unusually early heat wave smashed records across France, Britain and Spain. Temperatures in some areas are starting to soar again.

© Kin Cheung/Associated Press

A scientific analysis concluded that such high temperatures, across so much of the continent, would “not have been possible” without global warming.

© Christophe Archambault/Agence France-Presse — Getty Images

Records are being broken for the second time in a month, leading scientists to probe the upper limits of what the warming climate can dish out.