How is ALL of this possible if the Earth is warming? It's simple--the Earth isn't warming. Climate does change: It warms, it cools. It's cyclical. Empirical evidence for the last few years is clear. The Earth hasn't warmed since 1998. So much for that "theory."
The period of July 17-20 was the worst, with over 1,600 stations breaking records. It's worth noting that these stats include all records across the nation. Of the record lows, through July 20th (thanks to William Schmitz @ SERCC, check out their Twitter Feed), this was the regional breakdown:
Nationwide: 966
Southeast (AL/GA/FL/NC/SC/VA): 248
Northeast (MD/DE/PA/NJ/NY/CT/RI/MA/NH/VT/ME): 193