KUTUBDIA, Bangladesh — Anyone who doubts climate change should come to this lovely low-lying island, lapped by gentle waves and home to about 100,000 people.

But come quickly, while it’s still here.

“My house was over there,” said Zainal Abedin, a farmer, pointing to the waves about 100 feet from the shore. “At low tide, we can still see signs of our house.”

Already much of Kutubdia has been swallowed by rising seas, leaving countless families with nothing. Nurul Haque, a farmer who lost all his land to the ocean, told me that he may have to pull his daughter, Munni Akter, 13, out of eighth grade and marry her off to an older man looking for a second or third wife, because he has few financial options left to support her.