Sea level goes up in a hurricane, way up. And the only thing worse than freshwater flood for underground wires is saltwater. And if the ground mounted transformers are flooded and destroyed you're losing power. And once power is cut, the power co can't just flip a switch without burning down the whole city, because flood damage means 0.1% of houses will catch fire and the fire dept is already busy with their own issues not to mention trees in the road and such.
Sea level goes up in a hurricane, way up. And the only thing worse than freshwater flood for underground wires is saltwater. And if the ground mounted transformers are flooded and destroyed you're losing power. And once power is cut, the power co can't just flip a switch without burning down the whole city, because flood damage means 0.1% of houses will catch fire and the fire dept is already busy with their own issues not to mention trees in the road and such.