You know it's too hot to give tours when...

1) You come back from a double tour shift and are so incredibly out of it that one of your managers thinks you have heatstroke.

2) You come home and take off your work uniform only to discover that you have heat rash (again) on your chest.

3) One of your bosses has suggested that guides get trained for what to do when customers pass out.

4) One guide in particular has had 3 people with heat exhaustion on his tours.

5) Your Canadian/New England customers are melting into the sidewalk.

6) The bike seats become too hot to touch after being out in the sun for 5 minutes.

7) The water that you hand out to each customer is hot enough to quickly thaw a chicken breast (or maybe to poach an egg) after being out in the sun for 5 minutes.

8) It's so humid that you have to unstick your legs from each other before getting back on the bike.

9) Tour members start to sway and get woozy after standing outside of the Lincoln Memorial for about 2 minutes (there's no shade there).

10) You see a crowd of people outside the American Indian Museum rubbing their faces and hands all over a mysterious giant block of ice on the sidewalk. They have no idea and they do not care where it came from or why it's there or who touched it last.

11) Your Clif Bars have melted. Yes, melted.

12) It's 103 degrees with 50% or more humidity and DC has issued a heat advisory....

13)...and, with humidity, it's hotter here than it is in Phoenix, Arizona.

Well, duh.