Even though a considerable number of ordinary people have been relocated to the base cities, there are still many civilians living in unprotected towns and villages.
After witnessing videos and news of mutant beasts rampaging through towns and villages, people finally learned their lesson. Many built basements and stocked ample dry food and water, prepared to hide underground if mutant beasts reached their towns and villages.
The Flame Eagle, though very powerful, is ultimately just one mutant beast, unable to manage so many places. Thick concrete walls, along with layers of insulation, as long as they aren't destroyed, can offer temporary refuge inside.
The Flame Eagle, oblivious to this, wreaked havoc across the American mainland, causing countless casualties. It began flying across the vast sea, heading towards Huaxia.