The temperature hit 108 degrees at the Science Center in downtown Baltimore, with a heat index over 120. This was the hottest reading ever recorded for Baltimore, topping the previous mark of 107 set in 1936.
BWI saw a high of 106, breaking the daily record of 101, set in 1957. This was also the hottest temperature ever at the airport.
Here is some more information from the National Weather Service:
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
646 PM EDT FRI JULY 22 2011
...MAXIMUM TEMPERATURE AND HEAT INDEX...
THE FOLLOWING LIST SHOWS PRELIMINARY MAXIMUM TEMPERATURES AND HEAT
INDICES SO FAR FOR SEVERAL LOCATIONS ON FRIDAY JULY 22 2011 UP
THROUGH 6 PM EDT...
CITY MAX TEMP F MAX HEAT INDEX F
BALTIMORE MD INNER HARBOR...DMH 108 124
WASHINGTON DC REAGAN NATL...DCA 102 121
ANNAPOLIS MD................NAK 101 119
BALTIMORE MD BWI AIRPORT....BWI 106R 118
DULLES VA AIRPORT...........IAD 105R 117
CHARLOTTESVILLE VA..........CHO 102 112
MARTINSBURG WV..............MRB 103 111
HAGERSTOWN MD...............HGR 100 110
BALTIMORE MD-BWI BROKE A DAILY RECORD HIGH FOR THE DATE.
DULLES AIRPORT VA-BROKE ITS ALL TIME HIGH TEMPERATURE RECORD...ITS
TEMPERATURE RECORDS GO BACK TO NOV 1962.
NOTE...THE NWS DOES NOT KEEP HEAT INDEX RECORDS.
