One month after a devastating flood struck Nepal, a couple from Georgia, Mita and Hemant Parikh, are still trying to understand why they survived and returned home. The couple was part of a group of 47 people on a spiritual pilgrimage to Mount Kailash in Tibet. The tour company that organized their trip told CBS News Atlanta that none of the missing families from their group have been found—either alive or deceased. Seven guides are also missing, and all remain unaccounted for. The Parikhs had decided to take a side trip to Lhasa and Everest Base Camp before rejoining the rest of their group in Saga. Though they had initially hesitated, they ultimately agreed to the detour. They traveled with a guide and driver, saw Everest from a distance, and returned to Saga. However, while they were away, a massive flash flood swept through the river valley where their fellow travelers were staying. A flash flood is a sudden, powerful flood that occurs in a short period, often due to heavy rainfall in a specific area. The Parikhs initially thought the rest of their group had simply been delayed. They had limited access to news and faced a language barrier as they tried to understand what was happening. They waited for the group they were supposed to meet, but it never arrived. They tried calling their fellow travelers, but no one answered. The couple said their tour operator eventually flew over the area by helicopter. What had been the group's hotel was gone. "The hotel is not there anymore," Hemant said. "Not a single piece of concrete or pillar or anything. Nothing is there." Mita has found herself imagining what the morning may have been like for the people they had come to know—an ordinary morning before the flood arrived. "They were drinking tea. They were eating their breakfast about 8:30," she recalled. One month later, the uncertainty remains. Mita and Hemant eventually returned to Atlanta, but coming home has brought complicated emotions. "As soon as I close my eyes, I see Kailash, and I see the people," Mita said. "I don't know what happened." She still allows herself to hope that someone could be found, perhaps someone reached higher ground or shelter and has been unable to make contact. Hemant struggles with the same uncertainty. "I ask myself why?" he said. "And I don't have an answer." He also wonders whether there was something he could have done for the people they left behind. For Mita, the experience has changed the way she thinks about the life she returned to. She talks about spending more time with people, caring more deeply for others, and finding some purpose in having made it home. But she keeps returning to the decision that separated her and her husband from the rest of their group—a side trip, a different route, a choice that seemed entirely ordinary when they made it. "That's what keeps me awake," Mita said. "Why? Why God chose us to live. So there has to be some purpose, right?" One month later, Mita and Hemant still don't have an answer.