- Summary- Hospital in Sehwan, southern Pakistan, is overwhelmed- Patients pour in from flood-affected areas- Thousands are suffering from water-borne illnesses- WHO warns of 'second disaster' after catastrophic floodsSEHWAN, Pakistan, Oct 3 (Reuters) - The emergency ward at the main government hospital in Sehwan, a small town in southern Pakistan, is overwhelmed.Register now for FREE unlimited access to Reuters.comThe 30-year-old keeps his cool as stretched emergency services struggle to cope with thousands of patients arriving from miles around after their homes were submerged under water when heavy rains fell in August and September."We become so overworked at times that I feel like collapsing and going on an intravenous drip," a smiling Ahmed told Reuters as he sipped a cup of tea in the hospital's canteen during a short break."I hope people displaced by the floods can get back to their homes before winter; (if not) they will be exposed to respiratory illnesses and pneumonia living in tents," he said."We are short of human resources considering the magnitude of the burden of disease following the unprecedented rains and floods," Qasim Soomro, provincial lawmaker and parliamentary health secretary of the Sindh government, told Reuters."