MESQUITE, Texas (AP) — Eclipse spectators staked out their spots across three countries Sunday, fervently hoping for clear skies despite forecasts calling for clouds along most of the sun-vanishing route.

North America won’t see another coast-to-coast total solar eclipse for 21 years, prompting the weekend’s worry and mad rush.

Monday’s extravaganza stretches from Mexico’s Pacific beaches to Canada’s rugged Atlantic shores, with 15 U.S. states in between.