A massive car pileup on Highway 99 near Earlimart shut down the highway amid dense tule fog, resulting in at least 10 hospitalizations. The crash, involving 59 vehicles, occurred during near-zero visibility conditions, prompting a significant response from emergency services. Caltrans and the California Highway Patrol worked to clear the wreckage and reopen lanes, with traffic delays expected to persist.

The incident highlights the dangers of tule fog, a common occurrence in California's Central Valley during winter months. The fog, which has persisted since November, has caused numerous accidents this season, including a 43-vehicle pileup on Highway 58. National Weather Service advisories have been near-daily, warning of visibility dropping to mere feet in some areas.

Experts attribute the prolonged fog season to a stagnant high-pressure system trapping cold, moist air. This weather pattern, coupled with drivers traveling too fast for conditions, has led to a series of collisions. With the fog expected to continue, safety agencies advise drivers to slow down, use low beams, and follow lane lines rather than taillights.

The economic impact of such fog-related incidents is substantial, affecting commuters and commerce. As the weather pattern shows no signs of immediate change, businesses and commuters must prepare for continued disruptions. The CHP warns of ongoing delays, emphasizing the need for increased caution on highways.