Cuba is facing a health crisis caused by regular power outages and fuel shortages due to tighter U.S. measures under President Donald Trump limiting oil supplies. Cuba's main oil suppliers are Venezuela and Mexico, while the US has blocked supplies from Venezuela and is imposing sanctions on other countries. The lack of fuel causes daily power outages in cities and towns, which prevents hospitals from operating lights and basic examinations such as X-rays and ultrasounds. Ambulances do not operate without fuel and there are reports of medical staff shortages as doctors refuse to work in poor conditions or cannot get to work. The crisis came months after Hurricane Melissa, which saw a spike in infectious diseases. Cuba has less than two months worth of oil.