Authorities may warn of floods.Logical formLearned from9 sentences. A system can be constituted-of-or-filled-with (flood barriers).Logical formLearned from9 sentences. A (flood control) can be improved.Logical formLearned from9 sentences. Floods can be in some countries.Logical formLearned from9 sentences. Floods can be persistent.Logical formLearned from9 sentences. (Killer floods) may be caused by rains.Logical formLearned from9 sentences. Floods may destroy bridges.Logical formLearned from9 sentences. (Flash floods) can be lethal.Logical formLearned from9 sentences. A country may spend billions of dollars on (flood mitigation).Logical formLearned from9 sentences. Floods may be contaminated with chemicals.Logical formLearned from9 sentences. Diseases may be carried by floods.Logical formLearned from9 sentences. Some victims can be constituted-of-or-filled-with floods.Logical formLearned from9 sentences. A country may reel from floods.Logical formLearned from9 sentences. A situation may pertain-to floods.Logical formLearned from9 sentences. (Flood watches) can be in a us-state.Logical formLearned from9 sentences.