Meteorologists say 50 to 60 mm of rain are expected by early Thursday morning, though some areas may get more than 75 mm.
“This rainfall is due to a cold front and a moisture laden low pressure system that will arrive from the American Mid-west,” a statement from Environment Canada read.
The Upper Thames River Conservation Authority (UTRCA) is advising residents to watch out for flooding.
“If we get the lower end of what’s forecasted, we don’t think there’s going to be many issues,” said Teresa Hollingsworth, the manager of community and corporate services with the UTRCA. “But if we were to get all of the rain, we could see all of those creeks and streams flooding.”
In London, area such as Gibbons Park and Harris Park may see signs of flooding first, according to Hollingsworth.
“Those low-lying areas are most susceptible to flooding,” she said. “They’re the first areas that are going to see the results of any high water level.”
Tuesday is forecasted to have a high of 21 C and a low of 17 C overnight in London. Wednesday calls for a high of 20 C and a low of 12 C.
The rainfall warning covers London, Parkhill, Komoka and Strathroy.