An award-winning architect in Bangladesh, one of the nations most at risk from flooding driven by climate change, has developed an ingenious two-floor housing solution to help people survive what scientists warn is a growing threat.

This year, when the annual monsoon floodwaters swelled the country's mighty Brahmaputra River, 40-year-old farmer Abu Sayeed did not have to abandon his home for the first time in his life — but merely climb up a ladder and wait out the waters.

The Khudi Bari — resilient tiny homes made on bamboo stilts rising out of the floodwaters that are also easy to move to safer locations when needed — offers hope to millions.