what damages did it cause?
Approximately $8.5 billion in damage and killed 41 people.
Tropical Storm Allison
 Allison caused approximately $8.5 billion in damage (2001 USD), making it the costliest tropical cyclone that was never a major hurricane on record in the Atlantic basin. The storm also killed 41 people directly, including 27 who drowned.
how many inches of rain did hurricane allison bring to houston Over 40 inches. when did this happen? June 4, 2001. which places were affected by it? Texas to the Mid-Atlantic was effected.
wiki:4757032
Tropical Storm Allison [SEP] Impact
Tropical Storm Allison was a major flood disaster throughout its path from Texas to the Mid-Atlantic. The worst of the flooding occurred in Houston, Texas, where over 35 inches (890 mm) of rain fell. Allison caused approximately $8.5 billion in damage (2001 USD), making it the costliest tropical cyclone that was never a major hurricane on record in the Atlantic basin. The storm also killed 41 people directly, including 27 who drowned. This ties Allison with a tropical storm in 1917 as the second-deadliest tropical storm to affect the contiguous United States, surpassed only by the 1925 Florida tropical storm which killed 73 people.