Warmth is forecast to build over much of the eastern half of the nation by July, with Alaska of all places helping out.
The storms could affect cities from St. Louis to Evansville, Ind., Louisville, Ky., Cincinnati and Dayton, Ohio to Huntington, W.Va.
A tornado touched down at Denver International Airport as a severe weather system moved through the area.
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A slow-moving tropical depression will continue to bring torrential rainfall and the risk of flooding to parts of southeastern Mexico, Belize and Guatemala into midweek.
Some of the warmest weather of the year will continue across Alaska over the next few days, challenging more records.
Indianapolis, IN (1992)
The control tower at the airport was evacuated early in the morning during a severe thunderstorm. One-inch hailstones fell, a 62 mph wind gust occurred, and a tornado was spotted two miles northwest of the airport.
New England (1875)
Severe coastal storm (a possible hurricane) from Cape Cod to Nova Scotia. Eastport, MA reported 57 mph winds.
West Salem, WI (1998)
High winds downed a circus tent, injuring many people.