(S (S (BASENP (NNS Firefighters)) (VP (ADVP (RB now)) (VP (VBP fear) (SBAR (IN that) (S (S (BASENP (DT the) (NNS fires)) (VP (MD could) (VP (VB merge) (PP (IN into) (BASENP (NN one) (JJ giant) (NN blaze)))))) (SBAR (IN if) (S (BASENP (DT the) (NNP Santa) (NNP Ana) (NNPS Winds)) (VP (VBP continue) (NP (VP (VBG sending)) (ADJP (JJ close) (PP (TO to) (S (NP (CONJP (IN if) (RB not)) (BASENP (QP (RB over) (NN 500,000)) (NNS people))) (VP (VBG running) (PP (IN for) (BASENP (NN safety)))))))))))))))) (PERIOD .))