"(It´s) So hot you can fry an egg on the street" is acceptable (although, in the above picture the egg seems like plastic or something! he he). The imagery is what counts!
But the most used sentence "it´s so hot that you can fry an egg on the sidewalk."
It goes somehow against the scientific grain, but it is widely used by people all over the world.http://www.loc.gov/rr/scitech/mysteries/friedegg.html
That are some inventive corruptions of that expression:
- Rather than putting another shrimp on the barbie, it is so hot Down Under at the Australian Open you can literally fry an egg in Melbourne