We've included a few links that may assist you with your research or quandary.
Harris County Websites
Condemnation Process Diagram - Approximate Time Frame for Condemnation Process
Harris County - Official Harris County, Texas Home Page
Harris Central Appraisal District (HCAD) - Harris Central Appraisal District
HCAD Records Search - Records Search
HCAD Parcel Maps - Approximate Time Frame for Condemnation Process