The heat wave felt this weekend in the Great Lakes has shifted into the Northeast and Middle Atlantic, threatening record highs to start this week. Heat alerts extend from Maine to North Carolina, with Excessive Heat Warnings issued over five states that include New York and Philadelphia. High temperatures will surge well into the 90s this afternoon, with a few areas flirting with the century mark. With high humidity, the heat index may climb as high at 110. A cold front will push into the region Tuesday, bringing relief to the oppressive heat. Heat related illnesses such as heat exhaustion and heat stroke will be possible. People most vulnerable include those who are spending lots of time outdoors, those who do not have air conditioning, young children, the elderly, and those with chronic ailments. Recognize the signs and symptoms of heat illness. Early symptoms include things such as headache, thirst, and muscle cramps. Serious symptoms include weakness, skin that is cool to the touch, fast but weak pulse, nausea, and fainting. Severe symptoms include hot and red dry skin, fast and strong pulse, sweating that has stopped, and unconsciousness. Untreated heat illness can lead to fatal heat stroke. Residents are reminded to drink plenty of fluids, stay in an air-conditioned room, avoid prolonged periods in the sun, and check on relatives and neighbors, especially the elderly. Young children and pets should never be left unattended in vehicles under any circumstances. This is especially true during warm or hot weather when car interiors can reach lethal temperatures in a matter of minutes. For WeatherNation: Meteorologist Mace Michaels