Sinking feeling: Philippine cities facing 'slow-motion disaster' When Mary Ann San Jose moved to Sitio Pariahan more than two decades ago, she could walk to the local chapel. Today, reaching it requires a swim. The steady sinking of coastal towns and islets like Pariahan in the northern Philippines has caused Manila Bay's brackish water to pour inland and displace thousands, posing a greater threat than rising sea levels due to climate change. IMAGES AND SOUNDBITES.