Tondo's slums are a hive of activity:  Man leaves one of Tondo's older slum's market with egg cartons.  Tondo, Manila, Philippines.<br />
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Most of the vast slums of Manila's Tondo District in the Philippines are not only just a few meters above sea level but, in a seismically active area, are built on reclaimed land beside Manila Bay.  <br />
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On Maplecroft's Climate Change Vulnerability Index, Manila ranks as the world's second most vulnerable city to climate change.  Manila's Tondo is Manila's district most vulnerable to climate change-induced sea rises, storm surges from increasingly strong typhoons and earthquake trigger tsunami.  It has a population density of nearly 78,000 people per square km (202,800 ppl/sq mi), according to a 2009 Cornell University report.  (Note: Manhattan has a population density of 26,939/km2 [69,771/sq mi].)