The Met Office has issued a yellow weather warning for the Bath area, with persistent heavy rain and strong winds expected during Sunday and overnight into Monday.
Spells of heavy and persistent rain are expected over western areas, accompanied by strong winds at times.
The Met Office say there is a small chance that homes and businesses could be flooded, causing damage to some buildings and that some communities could become cut off by flooded roads.
Where flooding occurs there is a slight chance of delays to train and bus services whilst spray and flooding could lead to difficult driving conditions and some road closures.
There is also the chance of fast flowing water or deep floodwater causing danger to life. In addition, strong winds may be an additional hazard at times with trees falling, power cuts and loss of other services to homes and businesses possible.
Gusts of 35mph are expected in Bath on Sunday afternoon, and will remain high for most of Monday.
The Met Office’s Chief Forecaster said: “Spells of heavy rain are likely to reach western Britain later on Saturday and may become prolonged by the early hours of Sunday, only clearing southeastwards later on Sunday.
“Many places, particularly high ground will see 25-50 mm of rain, but where the rain becomes prolonged as much as 100 mm could fall over upland areas. The exact location of where the largest rainfall totals will occur is currently uncertain.
“Although it looks as if the more persistent rain should clear away southeastwards later on Sunday, further heavy persistent rain is possible in places on Monday; this appears more likely across the more southwestern parts of Britain.
“Strong winds are likely at times, with gusts of 50-60 mph possible in some exposed coastal areas.”