Two unrelated bursts of extreme rainfall slammed opposite corners of the country over the weekend and into Monday, triggering flash flood emergencies, mass evacuations and gubernatorial disaster declarations in Florida and across the Southwest just as the country heads into Election Day.

In Florida, thunderstorms dumped as much as 22 inches of rain in 24 hours on parts of the Space Coast, according to PBS NewsHour's reporting on the broader weather pattern, prompting the National Weather Service to declare a flash flood emergency for West Melbourne and Palm Bay. Water rescues and evacuations followed as streets turned into rivers. Governor Ron DeSantis declared a state of emergency across seven counties along the Atlantic seaboard, and the flooding may have been a contributing factor in Sunday's deadly business-jet crash in a nearby Palm Beach County neighborhood, which killed all nine people aboard.

Record rain across the Southwest

More than 1,500 miles away, an entirely separate storm system buried parts of Arizona, Colorado and New Mexico under what one National Weather Service meteorologist in Tucson described as "two or three months of rain in a span of a couple of days." Evacuation orders went out across low-lying areas of northern Arizona, with Sedona among the hardest-hit communities; Yavapai County officials said nearly 20 homes needed emergency assistance to relocate their residents, though no injuries or deaths had been reported there as of Monday. At least one person was reported missing elsewhere in the region. Arizona Governor Katie Hobbs declared a state of emergency to unlock state funding and resources, and evacuations also hit parts of Colorado, including a mountain spa town where officials warned conditions remained dangerous.

"TWO OR THREE MONTHS OF RAIN IN A SPAN OF A COUPLE OF DAYS" — NATIONAL WEATHER SERVICE, TUCSON

The timing has added an unusual wrinkle to Tuesday's midterm elections: NBC News reported that several Florida polling places were relocated after heavy rain and flooding damaged or threatened the originally planned sites, forcing county election officials to scramble to notify voters of new locations just hours before polls opened.

What's next

Forecasters say the Southwest system should gradually weaken through midweek, though rivers in parts of Arizona and Colorado were still expected to remain near or above flood stage for several more days. In Florida, state emergency management officials said cleanup and damage assessments were underway across the affected Atlantic coast counties, with federal disaster aid requests expected to follow in the coming days.