Heavy rainfall has flooded parts of Massachusetts and Rhode Island, with one city declaring a state of emergency.

Some beaches in the northeastern United States are dealing with more than the threat of COVID-19 this holiday weekend. They have to contend with an unwelcome visitor: the Lion's Mane jellyfish.

A total of 161 great white sharks have been spotted off the coast of Cape Cod, Massachusetts, since June. Experts say attacks on people are unlikely as the sharks are looking for seals.

The Division of Marine Fisheries is analyzing the clams and expects to have preliminary results in the coming days that might point to a cause.

BELCHERTOWN — A potentially harmful algal bloom in Lake Metacomet has officials recommending residents stay out of the water until the growth clears. “Basically, I’m advising people to avoid or minimize contact with the water,” said Erica Cross,...