Environment Canada has issued a heat warning affecting northern and central mainland Nova Scotia, which includes regions such as the Halifax Regional Municipality, the Annapolis Valley, and areas along the South Shore. This warning signals an expected rise in temperatures that may pose health risks to residents, particularly those who are vulnerable to heat-related illnesses.

The national forecaster has indicated that a warm and humid air mass will settle over these regions over the next few days. As a result, daytime highs are expected to reach between 29 to 30 degrees Celsius. When factoring in humidity, the temperatures are anticipated to feel significantly warmer, with perceived values ranging from 36 to 38 degrees Celsius extending through to Wednesday.

Allister Aalders, a weather specialist at 95.7 NewsRadio, explained that temperatures can vary considerably within the metropolitan areas. For instance, on the day of the report, a high of 29 degrees Celsius is expected, but with a "feels like" temperature of 35 degrees Celsius. In some urban areas, the temperature may be slightly cooler, while areas located along the southwest-facing coastline might experience a much lower temperature, around 19 degrees Celsius.

Residents are advised to anticipate minimal relief from the heat during the overnight hours. The expected overnight lows are projected to be in the high teens, offering little respite from the sweltering conditions experienced throughout the day.

Looking ahead to Tuesday, Aalders mentioned that the overall temperature is expected to be cooler, yet still warm for most areas. The predicted high for that day is 27 degrees Celsius, feeling like 33 degrees Celsius due to humidity, while coastal areas are likely to see temperatures around 19 degrees Celsius.

In light of the projected heat, Environment Canada is issuing a public safety alert, urging individuals to be vigilant for early signs of heat exhaustion in themselves and those around them. The symptoms of heat exhaustion may include headache, nausea, dizziness, excessive thirst, dark urine, and intense fatigue, which can escalate into more serious health issues if not addressed promptly.

Fortunately, weather forecasts indicate that a moderation in temperatures is expected beginning Thursday and continuing into Friday, with predicted highs around 21 degrees Celsius. This cooling trend will provide much-needed relief from the heat and humidity that have characterized the earlier days of the week.