Environment Canada has issued a heat warning for a majority of the Maritimes.
All of P.E.I., all of Nova Scotia and the majority of New Brunswick are now under the heat warning as a very warm airmass is scheduled to settle over the Maritimes this week.
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The government agency says that the next period of very warm temperatures across the region will begin on Tuesday.
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Temperatures on Tuesday could reach 30 C over inland areas before humidity levels push humidex values to 36 C or more.
Environment Canada says clouds and showers will move into the region on Thursday but the high temperatures and humidity will continue into the weekend.