Weather is the hot topic as eclipse spectators stake out their spots in US, Mexico and Canada

Eclipse enthusiasts are staking out their spots across three countries, fervently hoping for clear skies. Forecasts are calling for clouds along most of the sun-vanishing route stretching from Mexico to the U.S. to Canada on Monday. North America won't see another coast-to-coast total solar eclipse for 21 years, prompting the weekend's worry and mad rush. Four minutes of daytime darkness beckon in Mesquite, Texas, where many locals are getting the day off. Others traveled thousands of miles to witness the cosmic event, if the weather allows.