On the receding shorelines of low-lying Vypin Island off India’s western coast, T. P. Murukesan fixed his eyes on the white paint peeling off the damp walls of his raised home and recounted the most recent floods.

“The floods are occurring more frequently and lasting longer,” he said. The last flood was chest-height for his young grandson. “Every flood brings waters this high, we just deal with it.”

Sea level rise and severe tidal floods have forced many families in Murukesan’s neighborhood to relocate to higher grounds over the years. But the retired fisherman has almost singlehandedly been buffering the impacts of the rising waters on his home and in his community.

Known locally as “Mangrove Man,” Murukesan has turned to planting the trees along the shores of Vypin and the surrounding areas in the Kochi region of Kerala state to counter the impacts of rising waters on his home.

Tidal flooding occurs when sea level rise combines with local factors to push water levels above the normal levels. Mangroves can provide natural coastal defenses against sea level rise, tides and storm surges, but over the course of his life forest cover in the state has dwindled.

Murukesan said he grew up surrounded by beautiful, abundant mangroves that separated islands from the sea. Now, only fragmented patches of mangroves can be seen in Kochi, the state’s financial capital.

“They protected our houses against floods, sea erosion, and storms, used to be an inseparable part of our life, our ecosystem,” he said. “Only these can save us.”

Murukesan said he has planted over 100,000 mangroves. He plants saplings on alternate days and does most of the work himself. Some help comes in the form of saplings from the M S Swaminathan Research Foundation, a non-government organization based in Chennai, India.

His efforts come up against a strong trend in the opposite direction.

Ernakulam district, which includes Kochi, has lost nearly 42% of its mangrove ecosystems, including major decreases in the southern Puthuvypeen area in Vypin, according to a study released last year by the Indian Space Research Organization and the Kerala University of Fisheries and Ocean Studies.

Mangrove cover in the state has reduced from 700 square kilometers (435 square miles) to just 24 square kilometers (15 square miles) since 1975, according to the Kerala Forest department.

“The construction of coastal roads and highways has severely damaged mangrove ecosystems in the state,” said K K Ramachandran, former member secretary of the Kerala Coastal Zone Management Authority, a government body mandated to protect the coastal environment. “There should be an incentive for people who are making efforts to protect them.”

He said the mangroves he planted in and around the area in 2014 have grown into a dense thicket and are helping reduce the intensity of tidal flooding, but he’s nevertheless continuing his efforts.

Despite the thousands of new mangrove trees, other factors like climate change mean tidal floods have become more frequent and severe, sometimes keeping children from going to school and people from getting to work. It’s all mentally exhausting, Murukesan and his wife, Geetha, said.

“I have to travel a lot to collect seeds. My wife helps me in the nursery as much as she can. I am tired but I cannot stop,” he said.

Geetha said they do the tough work “for our children,” preserving the forest for decades to come.

“It keeps us going,” she said.