Nepalis started fleeing their devastated capital of Kathmandu on April 27 after Saturday's earthquake killed more than 3,700 people and toppled entire city blocks. The United Nations has launched a massive aid operation, but severed communications and landslides in the Himalayan nation pose formidable challenges. Residents of Kathmandu are in need of almost everything - shelter, fuel, food, medicine, power, news, workers, and more. People are searching for lost loved ones, sorting through rubble for their belongings, and struggling to meet their families' needs. The earthquake was the worst to hit the South Asian nation in over 80 years, strong enough to be felt across parts of India, Bangladesh, Tibet, and Pakistan.