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Last month was one of the warmest Junes on record in Baltimore, and persistent bouts of extreme heat could land Charm City’s summer on the wrong side of the record books. As the week begins, the next brutal heat wave has arrived. Temperatures are forecast to reach triple digits Monday and Tuesday, with high humidity capable of pushing the heat indexes to between 105 and 110 degrees.

It would mark the third and fourth days this summer that the temperatures have hit 100 degrees Fahrenheit at BWI Marshall Airport. On average, over the past 30 years, that has happened only about once a year, according to the National Weather Service. As of Thursday, the airport weather station has seen 25 days at or above 90 degrees and 12 days that reached 95.



The 30-year average? Fourteen days at or above 90 degrees, and three above 95. The sweltering temperatures have prompted heat warnings around the Baltimore area, stocked with cold water. Nevertheless, dozens of Marylanders have traveled to emergency rooms and urgent care centers seeking treatment for heat-related illness.

And six people have this year, including one person in Baltimore City and several in Prince George’s County. Last week, the Maryland Department of the Environment also for most of the Eastern Shore, with stream flows and groundwater levels lower than usual for the time of year. Residents were asked to begin reducing their water usage.

Conditions in the rest of the state are considered normal. Researchers say climate c.

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