Unusually heavy rain began to fall in and around the Indonesian capital Dec. 31, 2019: 377 millimeters (approximately 14.8 inches) were recorded New Year's Eve at an East Jakarta airport by the Meteorology, Climatology and Geophysics Agency (BMKG). That's the highest rainfall tally for a single day since records began in 1996, BBC News reported.

"This rain is not ordinary rain," the BMKG said in a statement reported by The Jakarta Post.

The BMKG said the extreme rainfall was caused by the combination of a monsoon and the fact that warmer Indian Ocean temperatures south of Java had allowed more water vapor to accumulate in the atmosphere.

The climate crisis generally is causing more extreme rainfall because a warmer atmosphere can hold more moisture and because more water is evaporating off the ocean, The Climate Reality Project explained. Jakarta is also especially vulnerable to flooding because it is the fastest sinking city in the world: a combination of sea level rise and land sinking caused by the drilling of groundwater wells and the weight of its buildings means much of North Jakarta could be underwater by 2050. Because of this, Indonesian President Joko Widodo announced plans to relocate the capital last year.

The current New Year's flooding has displaced more than 62,000 people in Jakarta alone, according to Reuters.

"It has not flooded for so long here. We didn't have the chance to bring anything," 52-year-old evacuee Umar Dani told Reuters. "I have to live on the streets now."

The extreme weather also cut power and disrupted train service. Floodwaters swamped the runway at Jakarta's Halim Perdana Kusumah domestic airport, closing it and stranding around 19,000 people, Al Jazeera reported.

The death toll is the highest for flooding since 2013, BBC News reported. The victims, aged between eight and 82, died from hypothermia, drowning and landslides. One 16-year-old boy, Arviqo Alif Ardana, was electrocuted, Al Jazeera reported.

"I did not know what had happened until his younger brother came and told me that his brother had died and when I came to the scene, people said that my child was electrocuted when he was holding a lamp post and tried to be rescued by local residents (but failed and died)," his father, Al-Latif Ilyas Darmawan, said.

Widodo told reporters Thursday that evacuations and safety precautions would be prioritized, Reuters reported. He also said on Twitter that flood mitigation projects had been delayed since 2017 because of problems with land acquisition.