File name: florida-keys_DHW_binned.png Original Resolution: 2000 × 2497 File Size: 345 KB (MIME Type: image/png) Date Published: September 26, 2023 Download file View image caption A record-high 22 Degree Heating Weeks (DHW) occurred this summer, nearly tripling the previous record of 8.5 DHW for the same region. NOAA Climate.gov image, based on data from Coral Reef Watch.