https://communityimpact.com/houston/sugar-land-missouri-city/government/2023/08/23/missouri-city-council-annexes-part-of-sienna-adds-6k-citizens/
"Missouri City Council gave the green light for the annexation of Sienna Municipal Utility District No. 2, a master-planned community, following an extensive series of hearings and discussions.
The annexation will require the city to accommodate and provide services for 6,000 new citizens, according to City Council documents."