Looking like we may hit 100 here( central md) by next Thursday according to LWX..
Heat will likely steadily ramp up Tuesday through Thursday as the
surface high slides offshore and the upper ridge expands eastward
from the Ohio Valley. While there is still some ensemble spread in
temperature data, it appears highs will be well into the 90s by mid
week. Humidity will also be elevated, so heat index values could top
100 by Wednesday and Thursday. The strength and position of the
ridge will determine if subsidence wins out, or if there might be an
opportunity for diurnal thunderstorm development. At this time,
thunderstorm prospects appear isolated through Thursday