Dozens of displaced Gaza families flooded into a UN school early Tuesday after Israel warned them to leave their homes, struggling to set up camp in a cramped, dirty courtyard. Hundreds of homeless Gazans were already living there, with this school in the **rthern town of Jabaliya packed to overflowing. Those who don't are entirely responsible for their own lives," said Ghassan Abed, who fled his home in the nearby town of Beit Lahiya the night before. The warning was sent by text message and automated voice calls to hundreds of thousands of people living in the **rthern areas of Beit Lahiya, Beit Hanun and Jabaliya, as well as to those living in Zeitun and Shejaiya to the south and east of Gaza City.