Talking about safety, Lithuania is generally a safe country. Crime rate is very low and most crimes are pick pocketing or thefts from vehicles. Just like in any other bigger western European cities, you should always be aware of the commonly known issues of the big cities.
There are no natural disasters like volcanoes, earthquakes or tornadoes. Forest fires do happen, but they are very minor compared to the ones raging in Southern Europe or Australia.
Although, sometimes you may encounter an unfair taxi driver service. Local Lithuanians already know it and do not use the airport taxi driver services, or shady taxis in the Vilnius Old Town because they might rip you off, or take you to some shady bar or a club. Do not overpay for your taxi, and use Uber or eTaxi mobile applications, or let us organise a private or limo transfer for you.