India, Aug. 29 -- After the devastating flash floods struck Nepal, many were surprised, even offended, when the Himalayan nation politely declined offers of international rescue assistance. For many, it appeared arrogant, but it wasn't. It was a wise decision born of experience.

Nepal's decision was shaped by the lessons of the 2015 earthquake. The tragedy triggered an extraordinary outpouring of global goodwill. Unfortunately, goodwill soon became a logistical burden and another disaster to manage.

Instead of concentrating solely on rescuing survivors, Nepali authorities found themselves coordinating 76 international urban search-and-rescue teams from 34 countries, besides foreign military and medical contingents.

Many rescuers were u...