The flood alerts. Under the heavy rainfall warning system, a yellow rainfall advisory is raised when the expected rainfall amount is between 7.5 mm and 15 mm within one hour and likely to continue. Communities given this advisory are advised to be aware of the weather condition and warned that flooding may be possible in low-lying areas.
https://www.officialgazette.gov.ph/how-to-make-sense-of-pagasas-color-coded-warning-signals/

