Atlanta temperatures have threatened to break records all week, and Thursday will be no different. Numbers fell just short of a record 100 degrees Monday, broke the record at 98 Tuesday and tied the record at 96 Wednesday. The projected high Thursday is 97 degrees, which would again break the record of 94, according to Channel 2 Action News. If it does, it would make this Sept. 12 the hottest on record in more than 100 years. The last time Atlanta saw this kind of heat was 1900. “It’s going to be awfully hot, record hot again today across North Georgia,” Channel 2 meteorologist Brian Monahan said. Atlanta is already warm with a starting temperature of 76 degrees. Under lots of sunshine and mainly dry conditions, temps will climb quickly Thursday, Monahan said. “The concrete, the pavement, the bigger buildings in the metro keep that heat in overnight, so it is much warmer as you head inside I-285 to start the day,” he said. Monahan said several atmospheric conditions are factoring into the heat, including an area of high pressure that is running the show. A record is also in jeopardy Friday. “Through today, through tomorrow, into Saturday, still showing this strong high pressure in control,” he said. “That’s going to mean really hot temperatures across North Georgia.” This time of year, temperatures should reach 84 degrees on average. Atlanta is likely to blow past that number at midmorning, according to Channel 2. By midafternoon, heat indexes are predicted to climb into the triple digits for much of North Georgia. “If we squeeze out a shower, it will be in the northeast Georgia mountains, otherwise through tonight, mainly clear and quiet,” Monahan said. “Tomorrow morning, we start warm and dry. It’s going to be another hot Friday across North Georgia.” Temperatures are eventually coming down, he said. A tropical wave over eastern Cuba Thursday morning has the potential to bring rain into North Georgia and help tamp down the heat. The wave of storms has two possible tracks, one that brings the wave into the Gulf of Mexico and another that sends it along the eastern coast of Florida. “You want a break in the heat? You need to root for this to head to the Gulf of Mexico,” Monahan said. By Sunday, metro Atlanta should break its 90-degree streak, according to Channel 2. The projected high is 89 degrees. “That’s when we start to watch that tropical wave that does have the potential to bring us some more rain clouds and cooler temperatures by next week,” Monahan said. Heavy delays remain at the Cherokee-Cobb county line after a widely-scattered crash shut down all southbound lanes of I-75 Thursday morning, according to the WSB 24-hour Traffic Center. The crash involved a jackknifed tractor-trailer, the Traffic Center reported. The interstate was completely shut down south of Ga. 92 between Acworth and Kennesaw until lanes began opening at 6:30 a.m. One left lane remained closed at 7:30 a.m., according to the Traffic Center. “If you are making your way in from the northwestern suburbs, your best alternates are U.S. 41 or I-575,” traffic reporter Mark Arum said. The I-75 express lanes are accessible at Hickory Grove Road, which Arum said will also get commuters around the bumper-to-bumper delays. » For a detailed forecast, visit The Atlanta Journal-Constitution weather page. » For updated traffic information, listen to News 95.5 and AM 750 WSB and follow @ajcwsbtraffic on Twitter. » Download The Atlanta Journal-Constitution app for weather alerts on-the-go.