Temperatures are on the rise in southwestern Connecticut, and will keep rising through the rest of the week, according to the National Weather Service.

As the heat wave -- accompanied by high humidity -- that has gripped much of the rest of the nation envelopes the region today, the NWS says the high temperature today is likely to be about 90 degrees. There is also a slight chance of showers and thunderstorms after 2 p.m. Skies will be mostly sunny with a north wind between 5 and 8 mph.

Tonight should be mostly clear, with a low around 68 degrees.

Tomorrow will again be sunny, with high temperatures in the mid- to upper-80s. Tomorrow night should be clear as the temperature dips to a low of about 71 degrees, the NWS says.

Thursday and Friday also will be sunny, with high temperatures about 90 degrees or above, the weather service predicts.