Toronto, the GTA and much of southwestern and central Ontario remains under a special weather statement on Tuesday.
Environment Canada says a slow-moving low pressure system brought a band of rain through those areas overnight into early Tuesday morning, bringing between 15 to 25 millimetres.
This same band will affect Central and Eastern Ontario throughout the day and into the evening, but locally heavier amounts of 30mm are possible to the northeast of Lake Ontario.
A few clusters of thunderstorms are expected to develop Tuesday afternoon from the Golden Horseshoe into Southwestern Ontario as well as in central regions near Georgian Bay. Additional significant rainfall amounts of 30 or 40 mm are possible in an hour or two, for some areas. Others may get more than 50 mm of rain.