The Met Office has issued a yellow weather warning for Ayrshire this evening.
The warning will run from 7pm this evening until midday on Monday, and is expected to bring disruption to the area.
Public transport could be impacted, with delays also likely on the roads as driving conditions worsen.
The Met Office said: "A large area of heavy rain will move northwards across northern England and into southern Scotland during Sunday evening.
"Whilst some thunder is possible, heavy rain is likely to be the main hazard with 15-25 mm of rain likely widely in 3 hours, and with 40-60 mm possible in places.
"One or two locations could see 80 mm or more, although this is a very small likelihood in any given place. Some localised flooding and disruption is possible as a result."
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