Temperatures hit 90 degrees in Baltimore by noon Wednesday, making this the region's seventh day in the 90s during the first nine days of September.
It was 90 degrees at Baltimore-Washington International Thurgood Marshall Airport as of noon. Factoring in high humidity, it felt like 95 degrees.
It was meanwhile 89 degrees and felt like 94 degrees at the Inner Harbor at noon.
September's tally of days with 90-degree heat now matches the count for July. There were six days in the 90s in June and only four in August.
The heat index is forecast to reach the upper 90s by Wednesday afternoon, before a cold front approaches the region and breaks the heat.
The front is forecast to move in from the northwest, crossing the region Thursday and ushering in cooler, drier air from the Great Lakes and Canada. It could spark some isolated storms late Wednesday and more widespread showers and storms Thursday.
Temperatures are forecast to drop close to and even below normal for the next week, at least, with highs from the mid-70s to the lower 80s Thursday through Tuesday.