Waves are getting bigger and surf at least 13 feet (about 4 meters) tall is becoming more common off California's coast as the planet warms, according to innovative new research that tracked the increasing height from historical data gathered over the past 90 years.

Waves are getting bigger and surf at least 13 feet (about 4 meters) tall is becoming more common off California’s coast as the planet warms, according to innovative new research that tracked the increasing height from historical data gathered over the past 90 years.