In Yemen, medical groups warned Thursday an outbreak of cholera has infected more than 100,000 people. The World Health Organization says the water-borne illness has claimed the lives of nearly 800 people, and Oxfam estimates cholera is claiming one life every hour in Yemen. The WHO says the number of cases could reach 300,000. The epidemic comes amid a U.S.-backed, Saudi-led bombing campaign and naval blockade that’s left the country’s sanitation, water and health infrastructure in shambles. The U.N. warns some 19 million of Yemen’s 28 million people need some form of aid, with many of them at risk of famine.