Wade posted a video to his Instagram account on Thursday night, showing scenes from downtown Miami and from his playing career with the Heat.
That 13-year tenure included three NBA championships and 12 All-Star selections.
"Heat lifer baby," Wade said in the video. "My city, my home, my house. That's how we roll."
The Heat also posted a video of Wade. That footage showed Wade and his wife, actress Gabrielle Union, walking off of a private jet after landing in Miami.
"Heat Nation, oh I ain't said that in a long time. It feels so good," Wade said in the video, posted to the Heat's Twitter account. "Heat Nation, I'm excited to see you guys. I hope you guys are excited to see me. I can't wait to get back on the court. I can't wait to put on that No. 3 and that Miami Heat jersey. So, I'll see you guys soon."
The Heat acquired Wade on Thursday in a trade with the Cleveland Cavaliers. Miami sent Cleveland a protected 2024 second round pick in the NBA Draft in that transaction.
Wade left the Heat in 2016, signing a multi-year contract with the Chicago Bulls in free agency. He joined the Cavaliers this offseason after being waived.
"It's about competing for a favorable playoff spot or even just to get into the playoffs. That's what this is about. And I couldn't think of a better player to bring in here without having to give up a lot of assets or young assets...to be able to get Dwyane back to help us in that role, I think it was a very good deal for us."
Wade posted another video late Thursday. He took the footage from his home in Miami.
"So we've had an eventful day, huh?" Wade asked Union. "We are definitely happy to be home. I want to start off by saying thank you to the Cleveland Cavaliers fanbase. Thank you to the organization and the players for accepting me with open arms. Obviously it wasn't the season that everybody wanted, but I think, for the most part, I came in and tried my best. So I hope that you guys saw that and felt that."
"I also want to thank the Miami Heat organization for bringing us back home. This is something that we've talked about for a long time as a family. It's something that the fanbase in Miami has talked about. I think we all thought and believed that one day it could happen and we are glad that one day is today. I'm excited to get this started. I'm excited to be back home in our bed, in our environment, with our kids, with our dogs, and the list goes on and on. So, thank you, to the fanbase in Miami. Thanks to the Miami organization, coaches, players for accepting me back. I can't wait to get this thing going. Let's go Heat."
The Heat host the Milwaukee Bucks Friday night at AmericanAirlines Arena in Miami.
Wade is expected to play.