Officials advise:

■ Come prepared for all types of weather, even 110 degrees. Wear lightweight, breathable clothes, and dress for comfort.

■ Stay hydrated — there will be free hydration stations throughout the festival. Look for the water droplet symbol on a festival map to find the nearest station.

■ If an emergency arises, find one of the free first aid locations or roaming medical teams throughout the venue, or contact the nearest stafff members, who are trained in emergency preparedness.

■ Use the buddy system. Know where your friends are, set up meeting points and stick together.

Nexttolewis,agroupoffriends huddledunderatowel.

“We just came off a plane from Maui,” Victor Franco said. “This is the second part of our vacation.”

A group garbed like members of the Justice League had a plan: They would wear Marvel costumes Saturday and dress like Earth Day on Sunday.

“Hold on. Let me put my cape on,” said Ivonne Perez, aka Wonder Woman.

Her friend, Marco Ramirez, said Friday would be his first time at a rave. The music and the scene promotes love and respect, he said.

“And this weekend we want peace. Because of all the shootings going on, we want peace,” Ramirez said.

Even though Las Vegas police said they would be cracking down on recreational marijuana, a group of newcomers passed around a blunt astheywaited.

“We’re from California,” 19-yearold Brian Hernandez said. “They can’t do nothing.”

Meanwhile, many more attendees found themselves stuck in traffic moving at a 4 mph crawl on some parts of northbound Interstate 15.

Throngs of vehicles faced delays of about 90 minutes just after 9 p.m. Friday between the East Lake Mead North Boulevard highway entrance and the Speedway Boulevard exit, leading to the speedway.

Contact reporter Briana Erickson at berickson@reviewjournal.com or on Twitter @brianarerick.