(NewsNation) Demand is surging for a U.S. rescue organizations services as thousands of Americans seek to leave Israel during the countrys ongoing conflict with Iran.In the rescue game, every days an adventure. Most of us havent slept in three or four days, including myself, Bryan Stern, founder of Grey Bull Rescue Foundation, told Elizabeth Vargas Reports on Thursday while updating his groups efforts to get Americans to safety.He said about 5,000 pretty desperate travelers have asked for assistance in exiting Israel as the U.S. State Department urges people not to travel to the Holy Land.Trump has reviewed attack plans on Iran: SourceI do agree with the State Department its time for everyone to go, Stern said. The situations going to get worse, not better. The risk is certainly increasing, not decreasing. You could always come back.Because airspace is restricted, Sterns organization, which is staffed by military veterans like himself, must make arrangements by land or sea for the evacuations. The latter option is not optimum, he said.Maritime operations are hard, and Im not really a fan of them, to be frank. Bad things happen on the water. Engines break. People get sick. People drown, Stern said. The land and the air are far safer and more forgiving.For information about how to help support Grey Bull Rescue Foundation, check out the organizations website.