In this March 19, 2017, photo, visitors walk among the poppy bloom at Antelope Valley California Poppy Reserve in Lancaster, Calif. Rain-fed wildflowers have been sprouting from California's desert sands after lying dormant for years - producing a spectacular display that has been drawing record crowds and traffic jams to desert towns. (AP Photo/Richard Vogel)

In this March 19, 2017, photo, visitors walk among the poppy bloom at Antelope Valley California Poppy Reserve in Lancaster, Calif. Rain-fed wildflowers have been sprouting from California's desert sands after lying dormant for years - producing a spectacular display that has been drawing record crowds and traffic jams to desert towns. (AP Photo/Richard Vogel)