Deadly floods across parts of Indonesia are a stark reminder of the climate change risks facing the Southeast Asian nation, environmentalists said on Monday, urging the government to be more ambitious in its efforts to cut planet-heating emissions.

South Kalimantan on Borneo island declared a state of emergency last week, after heavy rainfall and flooding since the start of the year displaced tens of thousands of people.

Indonesian President Joko Widodo visited the worst-hit areas on Monday.