Lake Forest

Whales native to Mexico and Central America are spotted dozens of times from Long Beach to the Palos Verdes Peninsula to Laguna Beach over the last three weeks.

Public health officials say two people in Southern California people have come down with dengue fever without traveling outside the United States, where the mosquito-borne illness is rare.

The oil likely will continue to encroach on Orange County beaches for the next few days, officials said.

Scientists have confirmed the existence of a DDT dump site in the waters off the coast of Southern California, and it’s even bigger than they had anticipated.

Unhealthful air quality is plaguing the region.

Many places across Southern California saw one of the warmest Julys ever recorded in 2018, including downtown Los Angeles and Death Valley

Authorities have warned residents to watch out for mosquito bites and clean out pet bowls as the Aedes aegypti species breeds in stagnant water.