Hagari said Israeli forces were expected to complete the evacuation “within the next 24 hours.”
“4,400 were launched into Israel,” Hagari said, referring to the barrage of rockets fired at Israel by Hamas since it began the attack at dawn on Saturday.
Hagari said 300,000 military reserves had been called up.
At least 700 people have been killed in Israel after hundreds of Hamas militants attacked across the Gaza border.
In response, the Israeli army has launched intense air strikes on Palestinian territory, killing at least 493 people so far.