Environment Canada has warned a heavy thunderstorm for Toronto, because there is rain again in the region. The GTA is still under a heavy storm watch.
"The conditions are favorable for the development of dangerous thunderstorms that may cause strong gusts of wind and torrential rain," said the National Weather Office.
The threat of thunderstorm will continue until the evening.
Earlier in the day, the National Weather Agency said that many areas will get between 20 and 40 millimeters of rain tonight, adding that areas affected by thunderstorms may see higher rainfall amounts.
680 NEWS meteorologist Jill Taylor said that Toronto is likely to see rainfall, with 30 millimeters of rain expected in the city.
Although there will be breaks due to precipitation, Environment Canada said that the torrential rains will cause "significant rainfall" in a short period of time.
"There will be rounds of showers that can sometimes be heavy and thunderstorms, and there is even the potential that some of these storms produce isolated tornadoes, mainly North and East GTAs," Taylor said.
"For areas that get thunderstorms, there can be heavy downpours … floods are certainly a risk."
The city of Toronto advises everyone to be extra careful while traveling and to take precautions to protect their property and ensure their safety.
The city says that the Transportation Services staff monitor the conditions on the roads and that they work to keep fishing areas free.
Both the city and Metrolinx have extra staff at Union Station in case of flooding.
The previous record rains for this date was 24.4 millimeters, set in 1964.
Dangers of driving during a flood