I would ask the driver every day if I had a car equipped with sirens.
The sirens need to be yanked from the vehicle (if they exist).
The Secretary of EPA isn’t in the line of presidential succession—even in the event of alien invasion:
https://en.wikipedia.org/wiki/United_States_presidential_line_of_succession
Even the Secretary of Education is higher on the pecking order (subtle reference: Battlestar Galactica :-) ).
When I was younger, a friend of mine slipped and broke his leg one winter day. After lying on the driveway for almost an hour, a neighbor noticed and called an ambulance. On the way the hospital, he told the EMT something was wrong. He said there were no lights and sirens and he’d waited 18 years for lights and sirens.
He got lights and sirens.
In Pruitt’s case, it was probably a joke.