A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.

A Kelvin wave is expected to hit California's coast around Oct. 1, potentially raising sea levels by up to a foot. Combined with a record-strength El Niño and the highest king tides in 18 years, scientists warn of severe coastal flooding and erosion risks for low-lying communities.