Mexico is a classic spring break destination. Cancún, Cabo San Lucas, Playa del Carmen and Puerto Vallarta made the list of this year’s 14 best spring break destinations by the U.S. News & World Report. However, a recent travel advisory is warning people to “exercise caution” in downtown areas of some popular spots in Mexico.

Here’s what we know.

Why is there a travel advisory for Mexico?

The U.S. Embassy and Consulates in Mexico issued a Feb. 19 advisory that warns travelers about crime, drugs, unregulated alcohol, sexual assault and other issues.

Here are the embassy’s nine potential issues to watch:

• Any illicit drug possession or use is illegal in Mexico, including medical marijuana, and can result in long jail sentences. U.S. citizens have also suffered severe illness or death after using synthetic drugs or fake prescription pills.
• Unregulated alcohol might be contaminated, and U.S. citizens have reported losing consciousness or becoming injured after consuming tainted alcohol.
• Counterfeit medication is common and can be ineffective or dangerous. Purchase medication from reputable places and consult a medical professional.
• U.S. citizens have been victims of rape and sexual assault. Perpetrators can target drunk or isolated individuals or provide drugs that alter the victim’s physical or mental state.
• Some beaches have strong currents and rip tides that could result in drowning. Beaches can lack lifeguards, warnings, or signs of unsafe conditions.
• Illness or accidents might require medical treatment or hospitalization. Private hospital prices in Mexico can be higher than in the U.S. or require upfront payment.
• All guns and even small amounts of ammunition are illegal in Mexico. Violations can lead to long jail sentences.
• In Mexico, it is illegal to be drunk and disorderly, urinate in public or have open alcohol containers in vehicles. Breaking Mexican law can lead to arrest.
• Violating the terms of your stay in Mexico can result in fines and detention.