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When Hurricane Ida tore through New Orleans more than a week ago, researchers there were relieved that the category-4 storm didn’t entirely flood the city. Its flood-regulating levee system, fortified after the devastation of Hurricane Katrina 16 years ago, seemed to hold. What took them by surprise was that Ida ravaged Louisiana’s power grid, 30% of which has yet to be restored — leaving residents to bake in the heat, universities closed and researchers struggling to preserve samples and keep projects running.