    Sentence 1: Hurricane warnings were  posted Friday along parts of th  lower Texas coast as Tropical St  Erika sped across the Gulf of Mexic  and headed for landfall .    Sertence 2: One month after Hurricane|  Claudette pounded Texas , hurrican  warnings were posted Friday.  parts of the coast as fast~movis  Tropical Storm Erika churned acros:  the gulf .    