People swim to avoid the heat in a swimming pool in the Everland amusement park in Yongin, about 50 km (31 miles) south of Seoul, July 13, 2008. REUTERS/Everland Amusement Park/Handout (SOUTH KOREA). NO SALES. NO ARCHIVES. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. SOUTH KOREA OUT. NO COMMERCIAL OR EDITORIAL SALES IN SOUTH KOREA.