People cool off in the Vltava river near the medieval Charles bridge in Prague June 9, 2014. A sweltering heat wave has hit the Czech Republic and temperatures are expected to rise this week, reaching a high of some 36 degrees Celsius (96.8 Fahrenheit), according to the Czech Hydrometeorological Institute. REUTERS/David W Cerny (CZECH REPUBLIC - Tags: CITYSCAPE SOCIETY ENVIRONMENT)