MISSION, Kan. (AP) Stock up on groceries. Print off driving directions. And be very, very patient.

Small towns and rural enclaves along the path of Aprils total solar eclipse are steeling for huge crowds of sun chasers who plan to catch a glimpse of day turning into dusk in North America.

Tourism and community leaders in the path of totality from Texas to Maine have trucked in extra fuel and port-a-potties, and urged residents and visitors to be prepared. Some counties have issued disaster declarations to get extra help with policing and other aid, similar to the aftermath of severe storms. And in Oklahoma, the National Guard will help.

Because of expected heavy traffic and other disruptions, hundreds of schools are closing or switching to remote learning in states including Texas, Indiana, Ohio, New York, Pennsylvania and Vermont.

WHY ALL THE WARNINGS?

Look no further back than the last U.S. total solar eclipse in 2017 to understand the concern, said Tom Traub, who is part of NASAs eclipse ambassador program.

That year, he traveled to Beatrice, Nebraska, where the normal population of around 12,000 swelled to around 40,000 as eclipse watchers arrived.

You had gas stations running out of gas, said Traub, who also serves on the board that runs the Martz-Kohl Observatory near Frewsburg, New York. You had restaurants running out of food. You had restrooms that were full and closed.

This time around, top viewing locations want to avoid a repeat.

They are preparing for mostly a worst-case scenario, he said. And hopefully that wont be the case.