Ahead of the annual Boston Pops Fireworks Spectacular this Friday, officials planning for the massive celebration are warning attendees on the Esplanade to remain vigilant and stay safe.

Kristaps Porzingis of the Boston Celtics high-fives a fan during the first half of a Jan. 8 NBA game against the Houston Rockets. (Photo By Matt Stone/Boston Herald) ...

Boston Celtics guard Jaylen Brown (7) talks with teammate guard Derrick White (9) after being called for a technical foul during the second half of Game 4 of the NBA Eastern Conference basketball ...