If you believe them, the NOAA GFDL CM2.1 global warming model shows a projected increase in average temperature for Maryland of around 2.8 degrees (F) in 50 years. That is roughly the increase in average temperature between Washington DC and Baltimore. So I guess all the people, animals, and plants in Baltimore couldn't survive living in the warmer conditions of Washington, DC.
Even today I hear that most residents of Washington, DC go to Baltimore to escape the summer heat and humidity. (/sarc for any Safe Climate Caucus members reading this.)