New Delhi, July 11 -- Omar Abu Atwa arrived at Al-Aqsa Martyrs Hospital with pain that had built for days. He waited six hours. No diagnosis came. The X-ray machine was down. The patient data system was dark. The power was out again, and in the darkness of central Gaza's main medical facility, no one could tell him what was wrong.

38 hospitals are either fully destroyed or non-functional, 96 primary healthcare centers have been rendered inoperable, and a medical system is being kept alive by secondary generators running far past their operational limits and solar arrays that were never designed to power an intensive care unit.

"I left without any diagnosis," said the 30-year-old driver. He spent most of the following day searching for a...