Further guidance should be provided to regional and municipal authorities regarding oversight of preparedness plans and response measures. In addition, steps should be taken to align the arrangements in Colombia with those in OECD countries. The OECD Guiding Principles in this field (OECD, 2003a, 2003b, 2011), along with the OECD Safety Performance Indicators for Public Authorities and Communities/Public (OECD, 2008a) and for industry (OECD, 2008b), could serve as useful guidance.