title: How should I temporarily redirect a website to a different domain?
body: <p>We are powering down our data center for 12-18 hours during an infrastructure audit. We need to post a 'temporarily unavailable' message on websites affected by this outage.</p>
  
  <p>In the past, I have changed the A-Record for the websites domain names to point to site hosted by a third party. The DNS changes appear to be instantaneous, but I worry about the potential 48 hour propagation lag.</p>
  
  <p>Is there a better way to temporarily redirect a site during an outage?</p>