Glass is a major problem in high-rise urban areas during hurricanes. Downtown Houston has been a very dangerous place in every hurricane there.

The problem isn't just retention of the glass but also eliminating debris. Gravel-covered roofs used to be popular until it was realized that a supply of pebbles 60 floors up atop a building meant neighboring buildings would be sand-blasted on the 45th floor, resulting in large pieces of glass falling 450+ feet to the streets below. Oops.