The Union Grove Municipal Center (925 15th Ave.) first floor Community Room will be open as a cooling center during normal business hours (8 a.m. to 4:30 p.m.) on Thursday, July 18 and Friday, July 19. The National Weather Service issued a heat advisory for all of southeast Wisconsin beginning at noon on Thursday through 11 p.m. Friday. According to the National Weather Service, highs will reach the lower 90s Thursday afternoon, with heat index values of 100 to 106. Highs will reach the middle to upper 90s on Friday, with heat index values of 103 to 110. Heat illnesses will be possible with prolonged outdoor exposure to the heat. The elderly, children, and those on certain medications are especially at risk for heat illnesses. The Union Grove Municipal Center can be reached at 262-878-1818.