The Met Office has put Courier Country on thunder alert with two weather warnings in two days.
The forecaster says thunderstorms may bring disruption to Dundee, Perthshire, Angus and Fife on Tuesday and Wednesday.
The majority of Scotland is covered by a yellow weather warning on both days, with two to three inches of rain is forecast across all of Scotland this week.
On Tuesday, the Met Office says thunder could hit between 11am and 10pm. The warning says: “Spray and sudden flooding could lead to difficult driving conditions and some road closures.
“Power cuts might 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.
“Flooding of homes and businesses could happen quickly, with damage to some buildings from floodwater, lightning strikes, hail or strong winds.”
The thunder alert in place on Wednesday, valid between 11am and 10pm, echoes the warnings above.
A second low pressure zone is due to arrive from Friday to Sunday, bringing more rain.
Two further low pressure systems are predicted for the following week.
However, weathermen said summer “isn’t over”. The Met Office said hotter and drier conditions, with temperatures up to 25C, are expected in the second half of this month.
The Met Office’s contingency forecast shows there is a 60% probability of this month having August’s hottest UK average temperature since 2004’s 16.1C.
Met Office forecaster Mark Wilson said: “There’s potential for high rainfall totals as low pressure dominates the next week across the country.
“We’re closely monitoring further warnings.
“The first low pressure brings heavy showers until Wednesday, heaviest in the North and West, and the next low pressure from Friday brings showers for the weekend.
“Unsettled conditions will probably persist until mid-month.
“After August 17 (there are) signs high pressure could build.
“There is the chance of warmer interludes, perhaps more widely later in the month.”