Mayor Edwin Olivarez has directed health centers in all 16 barangays of Parañaque City to remain open on Sunday, August 30, to provide doxycycline prophylaxis to residents who waded through or walked in floodwaters amid continued rains brought by the southwest monsoon, or habagat.The city government said residents exposed to floodwaters may proceed to the nearest health center for proper assessment and guidance from health personnel on the appro…