Travel Rotting seaweed, dead fish, no sand: Climate change threatens to ruin US beaches June 17, 2023June 20, 2023 Elizabeth Weise, USA TODAY Comments Off on Rotting seaweed, dead fish, no sand: Climate change threatens to ruin US beaches Warmer-than-average temperatures can mean more fish kills and shark sightings, increased rip currents and coast-covering seaweed blobs.