> LILCO's problems were compounded by NRC rules in the wake of Three Mile Island, requiring that operators of nuclear plants work out evacuation plans in cooperation with state and local governments. This prompted local politicians to join the growing opposition to the plant. Since any land evacuation off the island would involve traveling at least 60 miles (97 km) back through New York City to reach its bridges, local officials feared that the island could not be safely evacuated.[3]
There are currently 1.5M people in Suffolk County today, and millions more in adjoining areas. If that were a peacetime evacuation that would be one of the largest in history.