You know, I worked environmental emergency response and I was on call a lot of the time. Even if I was out on a date, at a dinner dance or whatever I had a bag in my car with a change of clothes. If I got called out it would take just a few minutes to change from (for example) long skirt, pantyhose and high heels into jeans, a t-shirt and steel-toed boots. I never felt the need to totter around an accident site dressed for a nightclub.