This weak spot kept Singapore from being the safest city in the world

It came in second behind Tokyo and topped several categories except one.

Singapore's safety score in The Economist's Safe Cities Index rose from 84.61 in 2015 to 89.64 in 2017, securing it at second place right after Tokyo.

Singapore landed the top spot for infrastructure security and personal security whilst landing second on digital security.

However, it missed the mark on health security and only placed 13th globally.

According to The Economist, cities with health security are designed with adequate walking and green spaces that encourage fitness and health. These conditions lower the risk of illnesses like heart disease.

Still, the Lion City was commended for helping its elderly live independently through the Elderly Monitoring System, which helps them track their daily activities and health.

"For cities with ageing populations, technology can help manage urban health and wellbeing more efficiently and at a lower cost," the report said.

In the report's infrastructure security sub-index, Singapore ascended from seventh place in 2015 to the top with a score of 97.05.

The Economist said cities that excel in this index devote investments in "green infrastructure" to better protect themselves during extreme weather events.

Within two years, Singapore also continued to secure the top spots for two other sub-indices.

Its score for personal security rose from 90.42 in 2015 to 94.94 in 2017. Cities in this subindex have installed security technologies like CCTV cameras with artificial intelligence (AI), so criminal behaviour can be detected as it happens.

The report mentioned its PolCam network that has helped solve more than 1,000 cases since its rollout in 2012.

Meanwhile, Singapore also stayed second best for digital security with an improved score of 86.84 in 2017, up from 83.85 in 2015.

Cities that topped this sub-index are "smart cities" have inter-agency cooperation that help protect themselves from cyber-attack vulnerabilities and fend off threats.