MOUNTAIN VIEW (CBS SF) -- Health and public safety officials are encouraging attendees of an electronic music festival in Mountain View this weekend to put their safety first.
The "Beyond Wonderland" show is set to take place at Shoreline Amphitheatre on Saturday and Sunday.
Officials are reminding attendees that illegal substances and drug-related paraphernalia will not be allowed at the event.
"Ecstasy and other 'club drugs' have very serious short and long-term health effects," Health Officer Dr. Sara Cody said in a statement.
"These drugs may be mixed with other chemicals, so people may not know what they are taking or how these drugs interact," Cody said.
Cocaine, MDMA, methamphetamine, LSD and ketamine are some of the common drugs found at large events that can place the user's health at risk, officials said.
"We must be cognizant of the realities that electronic music festivals are associated with controlled substances that can be used to cause harm and do damage to individuals," police Chief Max Bosel said in a statement.
Officials are asking people to make sure they stay hydrated, nourished and to have a backup plan if they're separated from friends.
Attendees should be watchful over their drinks and call 911 or Mountain View police at (650) 903-6395 if they have an emergency, officials said.
If anyone is seeking assistance and trouble gaining phone reception, they can notify uniformed officers and staff at the event.
The festival is produced by Insomniac Events, which is running the Bay Area event for the fourth year in a row. Popular DJs are set to perform including Calvin Harris, Tiësto, Blasterjaxx, Sean Tyas and Quintino.
© Copyright 2015 by CBS San Francisco and Bay City News Service. All rights reserved. This material may not be published, broadcast, rewritten or redistributed
for more features.