Record high in Philadelphia for July 21st (yesterday) was 103 degrees, set in 1930. Record highs for next Tuesday, Wednesday and Thursday (July 26-28) were 101, 100, and 100 degrees, set in 1892, 1940, and 1941 respectively.
All-time record high for Philly was 106, on August 7, 1918.
http://www.stormfax.com/phlminmax2.html