Treatment areas are often defined by colored tarpaulins, flagging tape, signs, or tents. Hercules planes carrying hygiene kits, shelter supplies, water containers and tarpaulins. The roofs remained open and were covered with tarpaulins. Temporary tarpaulins were also provided to patch roofs at no cost. Canvas tarpaulins are not 100% waterproof, though they are water resistant. The United States Army Corps of Engineers installed blue tarpaulins on 41,556 damaged roofs statewide. The materials to make tarpaulins and tyres were heavily affected by this rationing. Tarpaulins were used for covering the framework. A very strong topstitching thread suitable for luggage and tarpaulins, Tex 265-Tex 290. Partially covered by tarpaulins, it comprised several departments. Some protesters jumped a wall, broke into the godown, and looted the tarpaulins. The pitch was enclosed by a series of dark green tarpaulins. Concerned Teachers Rep. Antonio Tinio denied that leftist groups were behind of the tarpaulins. Soon, no one knew what lay under the tarpaulins.