According to the Alief Independent School District, the school was placed on lockdown once it was determined that a man, who was non-Alief ISD personnel, was on the roof.
At one point, HPD said the man remained seated on the edge of the school before being safely removed by first responders.
AISD said students and faculty were unharmed at the time and that the school day would resume as normal.
SkyEye13 was above the scene following the incident, where officers could be seen directing cars in front of the school as others worked to clear the scene.
It is unclear why the man was on top of the building or if charges would be filed.