Firefighters were dispatched around 2am for a smoke investigation. As crews turned the corner a citizen approached & advised one street over a 2 story house was on fire. First Engine company found a 2 story block home with heavy fire from the second floor & fire showing through the first floor door. A single 1 3/4″ was deployed after the first floor was extinguished Firefighters made their way upstairs & knocked down the second story. The entire unit was extinguished in about 10 minutes.