A buoy in Manatee Bay, about 40 miles south of Miami, posted a temperature of 101.1 degrees at 6 p.m. after a morning low of 91 degrees. Temperatures remained at or above 100 from 5 p.m. through late evening. For comparison, the “ideal” temperature of a hot tub is 100 to 102 degrees, according to jacuzzi.com.

Another day of dead marine life surfacing in Biscayne Bay as the swath of suffocated fish appears to be spreading.

South Florida beaches faced a sargassum assault this summer that some scientists believe is part of the largest spread of the nomadic marine weed on record, and one that could continue through September.

Sargassum, a type of marine algae, is washing up en masse on Caribbean beaches, closing them down to the public. The same sargassum is here in Miami, lining Miami beaches.

The foul-smelling seaweed is back yet again.

A species of seaweed has been washing up on beaches across the Caribbean and South Florida.

Heavy mats of seaweed are washing up on South Florida beaches, creating thick barriers to the ocean.

Cold temperatures have started the Fall of the Iguanas and the immobilization of sea turtles, whose bodies have a hard time adjusting to the change in water temperature.

Scientists are puzzled over what is causing hundreds of fish to wash up dead in South Florida, including an endangered species native to the region.

"Miami’s temperature climbed to 95 on Friday, at a time of year when average highs are 83."