Miami hit an all-time record on Tuesday. It’s more significant than you think

Key Points:

• Miami tied its all-time high temperature of 100 degrees Fahrenheit on Tuesday amid a widespread heat wave impacting areas from Texas to the Southeast, driven by a stalled heat dome.
• Despite Miami's reputation for heat, its all-time record is relatively low compared to other states due to its coastal location and high humidity, which limits extreme temperature spikes.
• The Southeast, including Miami, has seen a significant increase in extreme heat days, with Miami experiencing 44 more above-normal summer days than in the 1970s and a 2.6-degree average summer temperature rise.
• Dangerous heat and humidity levels have surged, with Miami recording 117 days of dangerously humid heat annually from 2016 to 2025, up from 50 days in the 1970s, largely attributed to human-caused climate change.
• Heat advisories remain in effect across much of Florida, excluding the Florida Keys, with Miami forecasted to experience mid-to-upper 90s temperatures and high heat index values continuing into Wednesday.