This document is a situation report (#6) from October 2, 2017, describing the cholera outbreak in Yemen. By October 1, 2017, there were 777,229 suspected cholera cases and 2,134 deaths across 22 of Yemen's 23 governorates. The response involves WASH partners providing hygiene supplies and water treatment, health cluster partners operating treatment centers, and communication campaigns reaching over 16 million people. Major challenges include limited supplies, security risks hindering access to affected communities, a weakened health system with over 55% of facilities closed or partially functional, and difficulties importing medicines and medical supplies. Children under 18 represent 60% of cases, while people over 60 report the highest death rates.