A race against time

1.2 million: the number of refugees forced out of their homes in Darfur, western Sudan in the past 18 months

1.2 million: the number of refugees forced out of their homes in Darfur, western Sudan in the past 18 months

36,000: the best estimate of the dead - the figure may be 100,000

377: villages found destroyed or damaged in a recent US satellite survey of 578 settlements

200,000: refugees likely to be in poverty-stricken neighbouring Chad by the end of the year

350,000-plus: people who could die in the next few months from disease and malnutrition

1 for every 285 people: provision of latrines in Kalma camp in July, against the aid agencies' target of 1 in 20. That was before mass increase in the number of refugees there

30 days: time the UN gave the Khartoum government to rein in the Janjaweed, or face sanctions

2 million: lives at risk, says chief of UN humanitarian operations, Jan Egeland

A day, a week, a month: all that may be left as the hunger crisis intensifies and the coming rainy season makes the health problems of mass refugee camps worse than ever