The risk of flash flooding focus along a large part of the Atlantic Seaboard Tuesday evening.
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.
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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.
The threat of flash flooding will focus along part of the Atlantic Seaboard Tuesday evening.
Ahead of the thunderstorms, temperatures will soar to between 85 and 95 degrees, mostly 15 to 20 degrees above normal, on the hottest one to three days between north-central France and Poland.
Weather favoring the spread of wildfires will increase over California, Nevada, Utah and Arizona Tuesday into Wednesday.
A brief synopsis of the top five worst weather events of last summer.
As the storm was not expected to approach typhoon intensity, widespread damaging winds were not seen as a significant threat.
New England (1875)
Severe coastal storm (a possible hurricane) from Cape Cod to Nova Scotia. Eastport, MA reported 57 mph winds.
Elizabeth City, NC (1991)
2.83" of rain in 2.5 hours.
Mayo, Yukon Territory (1950)
95 degrees -- hottest ever in province.