Environment Canada says humidex values could reach 34 on Tuesday and Wednesday

A heat warning has been issued for the southwestern half of Nova Scotia, including Halifax Regional Municipality.

Environment Canada says a warm and humid air mass will push daytime temperatures to near 29 degrees on both Tuesday and Wednesday, and humidex values could reach 34.

There should be a little relief for sleeping, with overnight temperatures going down to about 17 degrees.

Heat warnings are issued when high temperatures and/or humidity are expected to raise the risk of heat-related illnesses, like heat stroke or heat exhaustion.

To reduce the risk, the national forecaster recommends trying to schedule outdoor activities in the morning or evening, when it's cooler.

"Never leave people or pets inside a parked vehicle," says the advisory. "Outdoor workers should take regularly scheduled breaks in a cool place."

If you're looking to beat the heat, head to the coast, where onshore winds should cool things down.

But don't forget the sunscreen. Tuesday's UV index is forecast to be 8 or very high.

A cold front should sweep across the province Wednesday night.