The travails of the last year, when a bat virus infected humans and turned the world upside down, were an unfortunate reminder of the inseparable ties between society and the natural environment.

So it is with water, which will again this year direct the course of history, through events small and large.

What are the large events to pay attention to? What are the trends and flashpoints?

U.S. and Mexican officials settled a water dispute that had been simmering for several months and led to protests by Mexican farmers concerned about water access.

The global coronavirus pandemic, now in its third month, is precipitating a financial crisis for water utilities in low- and middle-income countries as many of these service providers face drastic cuts in revenue and rising costs to respond to the public health emergency.

The front lines in the battle to limit damage from the new coronavirus are expanding.

Covid-19, the disease caused by the virus, emerged in China and then blossomed in comparatively wealthy countries like Italy, South Korea, and the United States.

Now, the virus is spreading in poorer regions — in sub-Saharan Africa, South Asia, and parts of Latin America — where essential defensive measures against infectious disease are often missing.

Water is so scarce these days in Murrurundi, a drought-tested town in the northern reaches of New South Wales, that it arrives by truck.

Murrurundi Dam, an off-channel reservoir that draws from the Pages River, is functionally dry. An emergency well provides a little local water, but half of the small community’s supply is now trucked in.

“I’ve never seen the Pages River this low,” Daele Healy, who has lived in town for 15 years, told Circle of Blue. “There’s just no water visible at all. Not even little ponds.”

Rising concentrations of heat-trapping greenhouse gases in the atmosphere are reshaping the world from the top down, according to a special report on the world’s oceans and frozen regions from the United Nations climate panel.

Residents of Chennai, by all accounts, are miserable and anxious. The city’s main reservoirs are dry, depleted by the failure of successive monsoons to provide replenishing rains. The shortfall has crippled the piped distribution network, which is now meeting just half of typical demand through a mix of secondary sources: desalinated water, groundwater, and the impoundments from nearby stone quarries. Even that supply is far from adequate. Piped water reaches households once a week or less. Tanker trucks, an expensive alternative, dole out water by the bucketful to desperate crowds.

 This is what a water panic looks like in a major global city.

People hoard water. They queue for hours, well into the night, to fill jugs at natural springs. Like mad Christmas shoppers, they clear supermarkets of bottled water. They descend on stockers before they can fill the shelves.