HOUSTON — Civic Heart Community Services, a social services organization serving southeast Texas, has signed a 13,028-square-foot office headquarters lease in Houston’s Historic Third Ward. Civic Heart is relocating to One Emancipation Center from an office on nearby Elgin Street, where it had operated for the past 18 years. The term of the new lease is 10 years. John Guess of The Guess Group represented Civic Heart in the lease negotiations.