CAMARILLO – New federal flood plain maps suggest thousands of residents of Camarillo and Moorpark are in danger of being flooded during the next big storm. The updated maps, expected to be publicly released this month, more than double the size of the 100-year flood plain in the two cities. Broader boundaries mean more people will have to buy flood insurance, and developers’ multimillion dollar projects could be delayed or even scrapped. “This will have a significant impact on our residents and the developers who plan to build here,” said Barry Hogan, director of Moorpark’s Community Development department. The maps, which are expected to go into effect next summer, use new rainfall data and runoff calculations to update the flood plain boundaries in the Calleguas Creek watershed, which encompasses 341 square miles and four of the five fastest-growing cities in the county. Besides Camarillo and Moorpark, the watershed includes Thousand Oaks and Simi Valley, which saw little change to their existing flood plains. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! AD Quality Auto 360p 720p 1080p Top articles1/5READ MOREWalnut’s Malik Khouzam voted Southern California Boys Athlete of the Week New rainfall studies have been completed on the Ventura River watershed, and another is scheduled for the Santa Clara River zone, which includes Oxnard, Santa Paula and Fillmore. The results of those studies will be submitted to FEMA to update those cities’ existing flood maps. Some officials question the accuracy of the new maps but all agree the revisions are long overdue. The Federal Emergency Management Agency’s last official flood maps were issued in the 1980s. “There’s a lot more water, and it’s running a lot faster,” said Jeff Pratt, director of the Ventura County Watershed Protection District.