After several inches of rain drenched southwestern Connecticut yesterday -- and caused at least one death when a tree toppled on a Merritt Parkway driver -- more heavy rainfall, and possibly thunderstorms, are on the horizon today, warns the National Weather Service.

As of early this morning, scattered showers and fog are enveloping the area, but the NWS predicts the likelihood of storms -- some with heavy rain, strong winds and lightning -- increases after 11 a.m. and continues to tonight.

With the threat of more heavy rain, the weather service has issued a flash flood warning for the region at least through tonight.

Today's daytime high temperature is expected to be in the mid-70s.

Overnight, with the continued potential for more severe storms, the temperature will drop to a low of about 63 degrees.

Tomorrow, showers and thunderstorms are again in the forecast after noon. The daytime high should be in the high-70s. There remains a slight chance of showers and thunderstorms before midnight tomorrow.

Sunday should bring a break in the cycle of storms, the NWS predicts, with mostly sunny skies and a high near 77 degrees.