Cuba’s energy grid has collapsed, leaving millions without power, the latest in a series of failures on an island struggling from creaking infrastructure, natural disasters and economic turmoil.

It could also find uses for modeling power grids in areas where changes to the grid can happen rapidly as a result of natural disasters.

S ince a massive winter storm wiped out power to much of Texas in 2021, winter weather often leads to questions about the state’s power grid. But the grid was holding strong Thursday, with ...