Other Security Issues

Mexico City is no more nor less dangerous than most other large cities of similar size population.  Use the same street smarts you would use at home. Avoid wearing expensive jewelry and clothing, do not carry valuables in a knapsack on your back, especially on public transport, and keep you camera close to you. Stay on well-lit streets at night and do not venture into unknown areas of the city.

Be careful crossing streets - many of the main thoroughfares now have crosswalk signals that count down the seconds until traffic starts up again - but pedestrians should always be wary.

As a rule the food and water in Mexico City are safe, especially in hotels that cater to tourists.  Drink bottled water only, however, and, if you want to eat at a street stall, pick one that looks clean and is busy with clientele.