Triple-digit temperatures are likely to keep southwestern Connecticut sizzling again today, the National Weather Service warns.

The high temperatures yesterday broke the 100-degree mark at the region's NWS station in Stratford for nearly four hours yesterday afternoon, and the readings stayed in the mid-90s until nearly 11 p.m. Inland temperatures were even higher around the area than those recorded at the waterfront weather station.

Today promises to be more of the same, according to the NWS, which has issued another "heat advisory" because the impact of temperatures in the mid- to upper-90s combined with high humidity will make the heat index feel as though it's 100 to 104 degrees. The advisory remains in effect from 11 a.m. to 8 p.m.

An air-quality alert has also been issued because of the stagnant dome of high pressure enveloping the region.

After noontime today, there is also a slight chance of showers and thunderstorms. Otherwise, skies will be mostly sunny.

Tonight, the low temperature is expected to dip into the mid-70s.

Tomorrow is expected to see an easing of the oven-like conditions, with a daytime high in the high-80s to low-90s. There is also a slight chance of showers and thunderstorms before 9 a.m. The rest of the day should see partly sunny skies. Overnight, the temperature should fall to about 68 degrees.

Monday, the NWS predicts there is a chance of showers and thunderstorms, mainly after noon. Skies will be partly sunny, with a high near 81. The chance for precipitation rises a bit Monday night as the low temperature should be about 67 degrees.

Tuesday, the weather service predicts, will be mostly sunny, with a high near 82.