The Warsaw Ghettos were areas that Polish Jews were forced to move into by the Nazis starting in October 1940. Over 138,000 Jews were crammed into the walled 3 mile area of the ghetto, which made up only 2.4% of Warsaw but contained 29% of the city's population. Living conditions rapidly deteriorated as rations were limited to 200 calories per day, and thousands died each month from starvation, disease, and poor sanitation. Over time, around 300,000 inhabitants of the Warsaw Ghettos would be sent to extermination camps like Treblinka.