Historically high levels of flooding are affecting Midwestern states, including Nebraska, Iowa, North and South Dakota, Wisconsin, Kansas, Missouri and Minnesota. This follows a winter storm, known as the “bomb cyclone”, which brought blizzard conditions to western and central states in the week of 11 March. Hazardous weather conditions have led to at least 3 fatalities and local States of Emergency have been declared across affected areas. Thousands of evacuations have taken place throughout the region and local authorities are working to reach several communities cut off from outside help.

If you’re in an affected area or due to travel to one, you should monitor local media, follow the advice of the local authorities and check with your airline or transport provider before travelling. You can check forecasts and weather warnings on the US National Weather Service website. See Natural disasters

Around 3.8 million British nationals visit the United States every year. Most visits are trouble free. Take out comprehensive travel and medical insurance before you travel.

You’ll need prior authorisation to enter the United States using a British passport, either through a visa, a Permanent Resident Card, or the Visa Waiver Programme. Restrictions apply depending on the type of passport you hold, your nationality, criminal history, and countries you may have recently visited. Visa and other entry conditions can change at short notice. It’s your responsibility to know and understand the rules of entry before you travel. See Entry requirements

Terrorists are very likely to try to carry out attacks in the USA. Attacks could be indiscriminate, including in places visited by foreigners. You should monitor media reports and remain vigilant at all times. See Terrorism

UK health authorities have classified the United States as having a risk of Zika virus transmission in Florida, Texas (Cameron County and Hidalgo County only), Puerto Rico and the US Virgin Islands. See Health

You should be alert to the dangers of car and street crime. See Safety and security

Snow storms during winter can cause delays and cancellations throughout airports in the USA. See Natural disasters

If you’re abroad and you need emergency help from the UK government, contact the nearest British embassy, consulate or high commission.