A significant water scarcity alarm has been issued where river discharges have been extremely low for over a month.
The warning has been issued by the Scottish Environmental Protection Agency (SEPA).
People living in Fife are urged to take shorter showers and avoid using garden hoses. Rivers in the Borders have also had very low currents for more than 22 days.
Other Scottish Water recommendations include using a bucket and sponge instead of a hose when washing cars and turning off the tap when brushing teeth.
The scarcity has been attributed to a prolonged dry spell of weather, which has depleted supplies in central and north Fife.
The River Eden has had very low currents for more than 31 days – the highest level on SEPA’s Drought Risk Assessment Tool.
SEPA announced on Friday that parts of the United Kingdom have reached their highest water scarcity.
David Harley, SEPA’s chief officer for the circular economy, said: “While some rain has fallen recently in the east, it is not enough to repair deficits in the longer term.
“SEPA understands the implications for businesses facing these challenging conditions and is supporting sectors that depend on water year-round to become more resilient.”
Scottish Water chief operating officer Peter Farrer said customers can play an “important role” in managing the country’s water resources.
“We remain absolutely focused on ensuring customer inventories are maintained, especially when warm, dry weather has been experienced for an extended period of time,” he said.
“The public water supply supports everyday life around the clock and our national reservoir storage remains at a level where we can continue to meet the requirements.
“We’ve seen spikes in water demand, especially around hot weekends, and customers can play an important role in how we manage our country’s water resources.”