Officials say hundreds of climbers scaled Mount Everest in a single day, setting a new record with 274 successful ascents. Climbers took advantage of clear weather on Wednesday, according to Rishi Ram Bhandari of the Expedition Operators Association Nepal. This marks the highest number of climbers to reach the summit from the popular southern route in Nepal. Earlier in the week, veteran mountain guide Kami Rita Sherpa scaled the peak for the 32nd time, breaking his own record. The Everest climbing season began late this year due to risks from a huge serac over the key route.