2023 Caribbean heat wave

It was an intense weather event characterized by prolonged record-breaking temperatures affecting the Caribbean, South Florida, and the Gulf of Mexico.

[1][2] On June 6, 2023, a high-pressure system from east of Puerto Rico combined with dust from the Sahara, increased humidity, and record-breaking Atlantic temperatures (likely exacerbated by climate change)[3] to form a heat dome, which drove the local heat index to historic highs.

[6] The heat index surpassed 110 °F (43 °C) in some areas, with extremes of 125 °F (52 °C) in northern Puerto Rico.

San Juan set a record-high minimum of 82 °F (28 °C) for three consecutive nights.

[7] Sea temperatures also reached record levels in areas over the Atlantic Ocean.