The hurricane season normally runs from June to November and can affect US coastal regions. See Natural disasters
Around 3.8 million British nationals visit the United States every year. Most visits are trouble free, but you should take out comprehensive travel and medical insurance before you travel.
There is a general threat from terrorism. See Terrorism
The US Visa Waiver Programme (VWP) allows most British Citizen passport holders to visit the US for up to 90 days without a visa, but you may need to get authorisation from the Electronic System for Travel Authorisation (ESTA) before you travel. See Entry requirements
The VWP isn’t available to those who have a British passport extended by 12 months under exceptional measures put in place in mid-2014. You’ll need to apply for a visa from the nearest US Embassy or Consulate. See Entry requirements
All travellers arriving from Ebola affected areas in West Africa (Guinea, Liberia and Sierra Leone) must arrive at one of 5 major airports in order to undergo health screening. See Air Travel
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 the major airline hubs in the USA. Contact your travel company or airline before you travel. To monitor airport conditions in the USA, visit the Federal Aviation Administration website.