Londrina is generally safe, but as with traveling to any city, remember to always take basic precautionary measures. The city is modern with an active police force and it is friendly to tourists. Night-time should be treaded with a bit more carefulness, prefer to stay in populated and well-lit areas. Also, always keep your belongings secure and avoid showing flashy jewelry or expensive electronics, as you would do in any other metropolis. Utilize secure forms of transportation and be aware of your surroundings.