The waves are getting bigger, and we’re not referring to heat waves covering the U.S. A dangerous stretch of water that spans the Washington and Oregon coasts is known as the “Graveyard of the Pacific.” The Washington Post reports 1 million cubic feet of water per second collides with 20- to 30-foot swells over a 4-mile stretch of shifting sand. Columbia River barge pilots said ocean waves were becoming larger and more powerful in the Graveyard. Oregon State University researchers report buoy data verifies the height of the biggest waves off the coast has increased from 4 inches per year to 10 feet over the past 30 years. Changing storm tracks, high winds and intense winter storms could be the reasons.

Fastcast: Steamy.

Isolated showers. Mostly sunny, high near 94. Calm winds becoming southeasterly at 5 mph. Rain chance: 10 percent. Tonight: Partly cloudy, low around 73. Southerly winds 5 mph to 10 mph becoming calm.