Hundreds of rescuers dug through slushy debris and fast-flowing, icy water Friday in a search for survivors after a glacial lake overflowed and burst through a dam in India's Himalayan north, a disaster that many had warned was possible for years.

The flood began in the early hours of Wednesday, when water overflowed a high mountain lake with enough force to break through the concrete of a major hydroelectric dam downstream. It then poured into the valley below, where it killed at least 31 people. One hundred are still missing, officials said, while thousands of people have had to flee their homes.

Far more people are in harm's way as they move into high flood zones across the globe, adding to an increase in watery disasters from climate change, a new study said.

Since 1985, the number of the world's settlements in the riskiest flood zones has increased 122%, compared to 80% for the safest areas, according to a study in Wednesday's journal Nature by researchers at The World Bank. The authors looked at settlement extent and expansion using satellites instead of population, with the world's built-up regions growing 85% overall from 1985 to 2015.

Soldiers and firefighters were battling to control a new wildfire on Spain's Tenerife island that has forced some 3,000 people to leave their homes for safety, the Canary Islands government said Thursday.

The blaze, which started Wednesday, is centered on the towns of Santa Úrsula and La Orotava in the mountainous northeast of the island, away from the main tourist areas in Tenerife's southwest.

Typhoon Koinu swept southern Taiwan on Thursday, injuring 190 people but causing no deaths as it brought pounding rain and record-breaking winds to the island, leading to school and office closures.

Koinu, which means "puppy" in Japanese, made landfall early Thursday in Cape Eluanbi, the southernmost tip of Taiwan, and is expected to weaken as it moves west toward Guangdong and Fujian provinces in southern China.

Rescue workers were searching for more than 100 people on Thursday after flash floods triggered by a sudden heavy rainfall swamped several towns in northeastern India, killing at least 14 people, officials said.

More than 2,000 people were rescued after Wednesday's floods, the Sikkim State Disaster Management Authority said in a statement, adding that state authorities set up 26 relief camps for more than 22,000 people impacted by the floods.

Pope Francis shamed and challenged world leaders on Wednesday to commit to binding targets to slow climate change before it's too late, warning that God's increasingly warming creation is fast reaching a "point of no return."

In an update to his landmark 2015 encyclical on the environment, Francis heightened the alarm about the "irreversible" harm to people and planet already under way and lamented that once again, the world's poor and most vulnerable are paying the highest price.

Three homes were destroyed by a forest fire and a man was injured by a falling tree in the Bega Valley region of southeastern Australia, prompting a government leader to warn on Wednesday that a "horror" wildfire season was approaching.

Scores of wildfires have recently raged across the states of New South Wales, Victoria and Tasmania as Australia's driest September on record and unusually warm weather have brought an early start to the annual wildfire season, which peaks during the Southern Hemisphere summer.

Twenty-three Indian army soldiers were missing Wednesday after a cloudburst triggered flash floods in the northeastern state of Sikkim, the army said in a statement.

The flooding occurred along the Teesta River in Lachen valley, the statement said, adding that some army camps and vehicles were submerged under watery mud and that search efforts were underway. The army said water released from a nearby dam also caused water levels to rise.

More than 100 dolphins have died in the Brazilian Amazon rainforest in the past week as the region grapples with a severe drought, and many more could die soon if water temperatures remain high, experts say.

The Mamiraua Institute, a research group of Brazil's Ministry of Science, Technology and Innovation, said two more dead dolphins were found Monday in the region around Tefe Lake, which is key for mammals and fish in the area. Video provided by the institute showed vultures picking at the dolphin carcasses beached on the lakeside. Thousands of fish have also died, local media reported.

Eight years after warning in a landmark thesis of the devastation of man-made climate change, Pope Francis is publishing an update Wednesday to take stock and offer ideas for action.

The short follow-up to the 2015 encyclical "Laudato Si" ("Praise Be To You") comes just weeks before the next round of U.N. climate talks kick off in Dubai amid warnings that the world is perilously off course in meeting its goals on reducing carbon emissions.