dhaka/kutupalong bangladesh fee shelter nearly half million traumatize people make way course one month spit monsoon-soaked land 300,000 refugees already live squalor challenge aid workers scramble help rohingya muslims crowd cox bazar region southern bangladesh spasm violence myanmar rakhine state send flee across border nothing comparable term number people arrive short space time happen since 1994 rwanda say christopher lom asia-pacific spokesman international organization migration iom 480,000 men women children arrive cox bazar since end august accord unite nations estimate come nothing clothe wear nearly 200 women give birth since arrive another 20,000 pregnant meet need vast number indefinitely nowhere else go one poor regions poor country logistical nightmare bangladesh government u.n. agencies aid organizations taste come october november last year small outbreak violence bring influx 80,000 rohingya prompt improvements infrastructure coordination cox bazar say unite nations local chief coordinator robert watkins work extremely well say get wave humanity overwhelm u.n. high commissioner refugees filippo grandi say visit cox bazar week urgent need shelter clean water sanitation really first order business first challenge get people mud despair find place organize relief provide tell news conference geneva combination limit health facilities poor sanitary hygiene condition overcrowd sit ... recipe disaster term possible epidemics far 475 tonnes aid arrive chittagong airport north cox bazar much muslim-majority countries shock kill torch villages northwestern rakhine u.n. officials brand ethnic cleanse initial response chaotic say aid experts due sheer volume people arrive bangladesh since praise improvements organization sept. 14 meet prime minister office dhaka authorities make 22 decisions remove logistical hurdle accord document review reuters include build 14 storage warehouse regulate aid distribution protect orphan build roads power infrastructure set shelter 500,000 people mohammad shah kamal bangladesh secretary disaster management relief main coordinator aid effort say arm force scan shipments aid transport airports port cox bazar local officials take charge distribution think everyone surprise bangladeshi government say karim elguindi senior world food program official cox bazar note fast-tracking everything offer police support help customs delay inter-sector coordination group lead humanitarian response influx rohingya say recent update basic coordination still lack staff agencies assign specific camp bangladesh hop make room new arrivals build 2,000-acre camp ukhia area cox bazar u.n. say much area suitable habitation lack water sewerage roads many refugees already settle anyway complicate aid efforts private civic religious group throw food clothe back truck experts say way get relief needy thousands tarpaulin shelter refugees build recent weeks stretch across dozens small hill rice paddies accessible long walk across flimsy bamboo bridge families one remote part sprawl kutupalong refugee camp 40-minute walk near official distribution point say mostly rely handouts relatives survive mushtaq ahmed 66 religious teacher shelter rain tarpaulin say resort beg buy rice children grandchildren try throw scramble aid throw truck come away nothing many people rush say weak get 'wave humanity put aid agencies test bangladesh