All 10 professional baseball games scheduled for the next two evenings have been canceled due to extreme heat that has gripped the nation. The Korea Baseball Organization (KBO) announced that the five games slated for 6:30 p.m. Wednesday and five more set for the same time Thursday will not be played as scheduled, as it mulls changes to rules guiding games played in severe heat. Those games were set to take place in Seoul, Incheon, Gwangju, Daegu and Busan. Two games in Seoul and Gwangju, located some 270 kilometers south of the capital, were wiped out Tuesday, with both cities placed under the highest-level serious heat wave warning by the Korea Meteorological Administration. A serious heat wave warning is issued when apparent temperatures are projected to hit at least 38 C, or when daily maximums reach 39 C or above, in areas where the highest perceived temperature is 35 C or higher for two or more consecutive days. Three other games in Incheon, lying just west of Seoul, and the two southeastern cities of Daegu and Busan proceeded as scheduled Tuesday. The KBO had announced earlier Tue