My understanding is the Africanized bees largely bred with local bees and calmed down. Some hives can still be touchy.
When I was 10 years old (1986ish) in Brazil, we had a hive, pretty docile, no major issues. Our beekeeper friend that tended the hive for us had gotten pretty complacent because they were "tame" and "his" bees. They never bothered him even when he was cleaning/replacing frames. Maybe one sting a year. Well, this was around the time that some idiot brought a bunch of African bees over in the hopes of crossbreeding them and getting the best of both worlds - the docile nature of the western honeybees, and the increased production of the African bees. Well, they were a little more docile than pure African bees, but not much. And they began to spread north from southern Brazil. We didn't know it, but our colony cross bred over a year with an African hive. They were calm over the winter, but that spring, the beekeeper came to check on the hive and was attacked. The entire colony it seemed swarmed out at once. He was stung over 100 times, through his bee suit. Mom had taken myself and my younger brother out (I don't recall where), and had someone watching my infant twin brothers. She heard the screaming, saw him being attacked by the bees, and thankfully had the presence of mind to cover herself and the twins under a heavy blanket on the bed. There were dozens of stingers embedded in the blanket when it was inspected. That's the only thing that saved their lives. The beekeeper escaped by jumping in the pool. He was hospitalized in critical condition (and my understanding is that it was pretty touch and go). But the bees managed to kill our dog (100+ lb Fila pup).
We learned after the fact that there were the Africanized colonies moving from the south. My parents ended up killing the rest of the hive over the next couple of nights - they had to attach insecticide foggers to the end of 12+ foot bamboo poles to spray into the hives while another person watched for any bees that came past the foggers too fast to be killed right away and hit them with more spray.
Ever since then I've been wary of bees, and especially if there's any possibility of them having been Africanized.
