Well, apparently these noble words don't really apply anymore.
Recently we have had a lot of rain in the Houston area, and some folks have had some devastating flooding.
We have not. Thank goodness. However there has been some localized flooding as a result of backed-up storm drains. This has caused a few streets (ours among them) to be closed to through traffic.
But since there is no through-traffic, there is a semi-barricade at our end to keep traffic localized. This is enough to prevent our stalwart postal couriers from the swift (or any other kind of) completion of their appointed rounds.
There are probably no more than a handful of homes that would require the mail carrier to get out of the truck and walk to deliver the mail. But that is just not going to happen.
So with no notification of any kind (HOA e-mail network, social media, news release to broadcasters, etc), mail delivery has been suspended for any street in the city that has any kind of a barricade. If we want our mail, we have to go to the post office and pick it up.
It just doesn't take much to stay these couriers in today's world.