Extreme heat and humidity return to NYC to start the week, and we could see our second heat wave of the season.

A heat index topping 100 degrees will convert much of the tristate area into a sauna for the next three days, weather officials said Monday in yet another heat advisory. Heat trapped by a high-pressure “dome” over the region,

NYC faces a heat advisory with temperatures rising near 95 degrees before expected thunderstorms later in the week.