Between Cottonwood and MARC office the ceiling was leaking tonight, unprovoked by weather. Nelson was vacuuming and found it leaking. We put out a trash can to catch the leaking water, I put painters tape on the ceiling tile where it was leaking through, and looked above the drop ceiling. I put painters tape above the drop ceiling next to where it is dripping through at a seam where 2 pieces of the sheet metal roofing meet.