The primary concern during this migration event is the potential for bird collisions with lit urban areas, which can disrupt their natural navigation. Skyglow from artificial lighting poses a significant risk, particularly in urban centers, by attracting birds and increasing the likelihood of fatal collisions. Additionally, the disruption of nocturnal environments can negatively impact resting birds near stopover sites. The 'lights out' alert aims to mitigate these risks by encouraging residents to dim or turn off non-essential outdoor lighting during peak migration hours.