What is the four-level warning signal of rainstorm in Hainan?

The four-level rainstorm warning signal here is red.

According to the regulations of the meteorological department, red warning signal indicated that there will be heavy rainfall with high intensity and long duration, which may lead to urban waterlogging, flash floods, mudslides and other disasters. Once the red warning signal is released, people should take immediate measures to prevent risks, avoid going out and approaching dangerous areas, and ensure their own safety.