Miami's logo has mostly stayed the same over the years, it has always been a basketball with some fire coming out of it going into a hoop.
1989-1999: A Basketball going through a black hoop with a wordmark below.
2000-present: A color change.
1999-2005: "MH" in red and yellow.
1999-present: Partial logo without the wordmark.
2009-present: "MH" in white, outlined in yellow, black and red. Flame tip at the H.
1988-present: "MIAMI HEAT" in black. Flame tip at the T.
1999-present: 'HEAT" in red, outlined in black. Flame tip at the T.
2012-present: "HEAT" in white, outlined in black. Flame tip at the T/