Look at this photo. Children are walking along a road in Timbulsloko village in Indonesia, but it has been flooded by rising sea waters.
Many buildings in the seaside village have been swallowed by rising tides, so residents must adapt to a new life on the water.
More than 200 people have stayed in the village, which has turned from a landscape of lush rice paddy fields into a network of boardwalks over the water.
The sea has reached five kilometres inland around Timbulsloko. Village teacher Sulkan calls it a "slow disaster" happening before the world's eyes.
This is an alarming sign of how climate change could affect coastal villages, towns and cities everywhere, and that includes Hong Kong.
