We're just days away from the start of September and the start of meteorological fall. But it sure won't feel that way for much of the East Coast, and one city in particular will feel the brunt of this week's East heat. Boston, Massachusetts is expecting temperatures to reach near 100° on both Tuesday and Wednesday, which could either tie or exceed the city's hottest temperature in at least five years. Boston's hottest temperature so far in 2018 is 98°, and forecast highs for both Tuesday and Wednesday are 98°. If Boston hits 98°, it'd tie the city's hottest temperature since July 2013, when it got up to 99°, and if it gets to 100° (unlikely, but still), it'd be Boston's first 100°+ since July 2011, when the mercury soared to 103°, the city's second-highest temperature on record. Boston has only hit 100° in 18 of the years out of the 146 years of reliable records, so a 100° mark would certainly stand out if Boston is able to get there. Again, that's not currently forecast, but it is a possibility. Tuesday's daily record for Boston is 99°, while Wednesday's record is 96°. One or both could be tied or broken this week. Of course, this doesn't factor in the humidity, which will make those already scorching temperatures feel even hotter. The National Weather Service office in Boston is calling for heat indices - the number that really matters because it combines heat and humidity - to reach 105°, meaning prolonged time outdoors should be avoided, particularly during peak heating hours. It's going to be dangerously hot, even for East Coast summer standards. https://twitter.com/NWSBoston/status/1034002515296243712 Excessive Heat Warnings are in place for the immediate Boston metro area for Tuesday and Wednesday. By the way, Boston's warmest temperature on record? A 104° reading, back in July of 1911. The city's official meteorological records date back to 1872. Stay with WeatherNation for the latest on Boston's heat and a full look at the East Coast late summer sizzle. For WeatherNation: Meteorologist Chris Bianchi