The Mediterranean Sea's marine heatwave is literally off the charts.

Sea surface temperatures off the coast of Italy are as warm as those in Miami, exceeding 30°C (87°F).

Water temperature anomalies are up to 7°C (13°F) above normal.

Expect devastating consequences for marine… pic.twitter.com/x7BPOaToP4

— Colin McCarthy (@US_Stormwatch) July 8, 2025