Passable or not? MMDA releases flood measurements

The acronyms beside the flood measurements (in inches) stand for the following, as tweeted by the MMDA:

 

UPDATE: As of 12:05 pm, the flooding situation in Metro Manila follows: 

MANILA 

SOUTHERN NCR (Parañaque, Muntinlupa, Pasay, Las Piñas)

QUEZON CITY

- Rappler.com