If you go to pretty much any beehive in the country in Aug/Sept you will more likely, as opposed to less likely, see a wasp trying to get in. If they get in, they most usually get killed. No need for beek to panic.
Keep strong colonies. Put entrance blocks in before wasps season starts. Don't set up wasp traps because they attract hundreds of them that wouldn't otherwise come.
Any sickly or weak or small colony, then vigilance is required. Go down to very small entrances is problem starts.