Heat wave at winter’s end

A Spider-Man impersonator lurks on Hollywood Boulevard as people pass on a hot day Saturday.  (Robert Gauthier / Los Angeles Times)

Unseasonably hot weather bought crowds to Laguna Beach on Saturday.  (Gina Ferazzi / Los Angeles Times)

John Boal looks on as his granddaughter Mia Verwey, 7, jumps from one rock to the next along a trail at Balboa Park in Lake Balboa on March 13, 2015.  (Mel Melcon / Los Angeles Times)

A 2-inch-long painted lady butterfly rests on a desert sunflower on Henderson Valley Road in Borrego Springs on Mar 13, 2015. Periodic rain through the winter has brought an abundance of desert wildflowers to bloom in selected locations. Flowers along Henderson Canyon Road are at their peak but will likely fade by week’s end  (Don Bartletti / Los Angeles Times)

A woman beats the heat carrying an unbrella at MacArthur Park in Los Angeles on March 13, 2015.  (Wally Skalij / Los Angeles Times)

Yellow-orange desert sunflowers and purple thistle sage are at their peak among a carpet of desert wildflowers on Henderson Valley Road in Borrego Springs, on March 13, 2015.  (Don Bartletti / Los Angeles Times)

Beneath a blazing midday sun, Al and Janet Baumann from Mission Viejo admire the yellow-orange desert sunflowers and purple thistle sage at their peak in Borrego Springs on March 13, 2015.   (Don Bartletti / Los Angeles Times)

Bill Miers of Bellingham, Wash., snaps a photo of Disney Hall. Temperatures are expected in the 90s this weekend.  (Robert Gauthier / Los Angeles Times)

A hiker braves the heat during a climb near Juan Bautista de Anza Park in Calabasas on March 13, 2015, as a heat wave grips the Southland.  (Al Seib / Los Angeles Times)

Camryn Wiener, 7, catches air while staying cool on the swing at Juan Bautista de Anza Park in Calabasas on March 13, 2015, as a heat wave grips the Southland.  (Al Seib / Los Angeles Times)

Camryn Wiener, Jadyn Wiener, Erin Rasborn, Ryan Brooks and Sami Rasborn, from left, catch their breath while playing at Juan Bautista de Anza Park in Calabasas on a shortened school day March 13, 2015, as a heat wave grips the Southland  (Al Seib / Los Angeles Times)

Andrea Sanchez, 8, and her brother Enrique, 3, of Los Angeles cool off in the fountain at Grand Park on March 13, 2015, as temperatures downtown reached into the high 80s.  (Robert Gauthier / Los Angeles Times)