Thunderstorms and “torrential” rain are forecast to hit the whole of Tayside and Fife in the coming days.
The Met Office has issued two new yellow weather warnings for Courier country effective across Friday and Saturday.
It comes after heavy rain led to flooding hitting the area from Tuesday night into Wednesday – with homes evacuated in Fife.
The Scottish Environment Protection Agency (Sepa) also issued flood alerts for Fife, Dundee, Angus, and Perth and Kinross on Wednesday warning of “heavy thundery showers”.
Sepa added: “If your area is affected by a heavy thundery shower, this may lead to localised flooding from surface water and small watercourses.
“The greatest risk is if these occur over built-up areas and the transport network with possible impacts including flooding of low-lying land, roads, properties and disruption to travel.”
A Met Office rain warning will be in place for the whole of Friday, with a thunderstorm one in place for the entirety of Saturday.
The forecaster said that local properties will be at risk of flooding and lighting strikes on Saturday as “slow-moving, heavy” downpours batter the region.
It states: “Slow-moving heavy, thundery showers on Saturday may produce some torrential downpours which could cause disruption to travel and flooding.
“There is a small chance that homes and businesses could be flooded quickly, with damage to some buildings from floodwater or lightning strikes.
“Spray and sudden flooding could lead to difficult driving conditions and some road closures.
“There is a slight chance that power cuts could occur and other services to some homes and businesses could be lost.
“Where flooding or lightning strikes occur, there is a chance of delays and some cancellations to train and bus services.
“There is a small chance of fast flowing or deep floodwater and there is a small chance that some communities become cut off by flooded roads.”
Friday’s rain warning reads: “A band of heavy rain followed by heavy showers or thunderstorms has the potential to bring disruption.”
It states that home and businesses could be at risk of flooding, with travel disruption also possible.