(S (S (BASENP (JJ Hazardous) (NN material) (NNS crews)) (VP (VBP have) (VP (VP (VBN blocked) (NP (BASENP (NN water)) (VP (VBN used) (PP (IN in) (BASENP (DT the) (NN fire)))))) (PP (IN from) (S (VP (VBG entering) (BASENP (DT the) (NNP Dallas) (NN storm) (NNS drains)))))))) (PERIOD .))