As millions of Americans head to the polls, thunderstorms are forecast from the Great Lakes to the Gulf Coast, with the potential to cause inconveniences to voters across the country.

The heaviest concentration of rain is expected in Wisconsin, Louisiana, eastern Texas and Arkansas but heavy rain along the Mississippi River and Ohio River valleys could bring flash flooding and approximately 2 inches to 4 inches of rain between Louisiana and southern Indiana.

Meanwhile, heavy snow is forecast in the Rockies from Montana down to Colorado and winter weather alerts have been issued in those regions.

In California, strong winds and dry conditions will create a threat for wildfires from the San Francisco Bay area down to Los Angeles where a red flag warning has been issued.

However, beautiful weather is forecast in the Northeast today, with warm temperatures in the 70s across much of the eastern seaboard and potential record highs from Meridian, Mississippi, all the way to Rochester, New York, with temperatures in the 80s.

The record heat is expected to concentrate in the Northeast on Wednesday with record highs possible for major cities such as Washington, D.C., Philadelphia and New York City with temperatures close to 80 degrees.