HOUSTON, Texas (KTRK) -- With hurricane season underway, the U.S. Chemical Safety and Hazard Investigation Board (CSB) is urging chemical and petroleum facilities nationwide to prepare for storms before they arrive. Southeast Texas is home to one of the largest concentrations of refineries, plastics plants, and chemical manufacturers in the country, making the region particularly vulnerable to disasters when storms strike. The call for preparedness follows lessons learned from catastrophic chemical incidents, including one that happened in southeast Texas. SEE HERE: Tropical Update: A potential tropical wave to watch off the Florida coast in the Atlantic During Hurricane Harvey in 2017, the Arkema plant in Crosby suffered major failures. Flooding disabled backup power and refrigeration systems, causing organic peroxide to ignite. The resulting fires led to evacuations and hospitalizations and triggered years of litigation. Federal safety officials say many of those consequences can be prevented.