In this work an alternative approach to estimate the Intensity-Duration-Frequency curves is used. This approach which uses point precipitation models recently proposed in the literature are used to obtain the IDF curves. This is based in the works of Rodriguez-Iturbe et al. (1987) and Burlando and Rosso (1989). The ability of these point models to represent extreme rainfall characteristics, when only daily records are available is also analyzed in this paper. This will greatly enhance the applicability of site specific IDF curves instead of using regionalized values which may not represent appropriately the rainfall characteristics at a specific site. The approach was applied to the historical records in Harris County, Texas.