"Earth Element, Gold Element, seal the entrances and exits, reinforce the walls, and remember to leave a path for two people to pass through, we'll be entering and exiting later....."
After the war between the two sides formally started, someone was specifically responsible for ordering the closure of all subway entrances.
Thankfully, despite the Earth's population being less than thirty million, courtesy of the group awakening plan, there were five million superpowered individuals at this moment. Although most of these superpowered ones were of poor ability only at Red Level and it was quite difficult for them to level up, the evolution still enhanced their physical fitness. Therefore, they were able to assist with this kind of work with no decrease in efficiency.
Besides, one after another, trucks filled with sandbags were driven to the top of the air-raid shelters and subways.
"Everyone, fill the sandbags and spread them on the ground…"
