Simplify the following text for a Grade 7 native English-speaking person.
Original: The municipal seat was first called Placeritos de Nacozari but changed its name to Nacozari de GarcÃ a to honor the railroad engineer JesÃ s GarcÃ a , who saved the town from a dynamite explosion on 7 November 1907 .
Simplified: The town was first called Placeritos de Nacozari but changed its name to Nacozari de GarcÃ a. The town was named after the railroad engineer JesÃ s GarcÃ a , who saved the town from a dynamite explosion on 7 November 1907 .