Here is a comprehensive look at safety in Houston:
https://safearound.com/americas/united-states-of-america/houston/
Crime in Houston is high, and the city has a reputation among Texans a a high crime city. Travelers to Houston should follow common safety procedures such as staying away from deserted areas after dark, keeping purses/wallets in a secure location, and putting valuables out-of-sight in parked vehicles. However, it is important to always keep an eye on your belongings and remain alert for any suspicious activity. Some areas recommended to avoid are Houston’s Third Ward neighborhood near the University of Houston and Sunnyside south of Downtown Houston. These areas have a very high crime rate, especially for violent crimes. There is gang related activity in the Southwest side of Houston, so it is best to not visit, especially at night. We recommend to visit the tourist areas of Houston like Downtown Houston, Memorial City, the Galleria area, and the Medical Center.