On 4 June 1997, the red signal was issued at 7.05 am, but the Education Department only decided to close afternoon schools at 10.30 am, saying that it did not close morning schools in spite of the red signal because many students were heading to schools at that time. Following criticisms by the Ombudsman, the Hong Kong Observatory revised the rainstorm warning system to the current one in 1998, and the Education Department also revised the school closure system for rainstorm. The current rainstorm warning system consists of three signals based on both predicted and recorded rainfall levels, and all three signals are issued to the public.