People in the Gaza Strip say there's no mains electricity there now, because its only power station has run out of fuel.
Israel, which mostly surrounds Gaza, has placed the Palestinian territory under siege.
In response to the attack by Hamas militants on Jewish towns, Israel has mounted a massive bombing campaign, and cut off supplies of food, water and fuel.
Hospitals, schools and homes in the Gaza Strip are now relying on back-up generators that are also running short.
Correspondent Ross Cullen spoke to Corin Dann.
