Callies' father, Reverend Raymond A. Callies, Sr., is credited with starting the Martin Luther King Jr. Day March in San Antonio that draws hundreds of thousands of people to the East Side today.

SAN ANTONIO - Despite the extremely cold weather, plans are moving forward for Monday morning's Martin Luther King Jr. March here in San Antonio.The march line

Amid heightened security concerns, the San Antonio Police Department plans to boost security, restrict drones, at MLK March.

If frozen precipitation enters the forecast at march time, organizers said the event will be moved to the Alamodome. That call will be made Sunday night.

MLK March is set to draw thousands Monday to the East Side despite the cold weather, organizers say. By the numbers: Dwayne Robinson, chair of the MLK Commission, previously told Axios the march typically draws 150,