Tell her to stay away from the Green Line! If she stays near the monuments, she should be fine. As you say, though, it will be 450 degrees in the shade.
By all means, stay away from the shade!
Of course it will be fine. I wouldn’t hesitate to go to DC. In fact, I’d like to go again after Obama is defeated.
I’m sure they will go to the touristy places.
I wouldn’t worry, especially since there’s not a dang thing you can do about it anyway. Just tell the kids to have a good time.