Heavy rain hits the war-ravaged Gaza Strip, flooding the sprawling tent camps where hundreds of thousands of people live and triggering an "immediate humanitarian emergency". newsiviewlistenLoading ABC NewsNews HomeDesperate scramble for materials as 200,000 without dry shelter in Gaza flood 'catastrophe'ShareShare articleDesperate scramble for materials as 200,000 without dry shelter in Gaza flood 'catastrophe'By Middle East correspondent Matthew Doran, Cherine Yazbeck and ABC staff in GazaTopic:Floods.