Severe

* WHAT...Dangerously hot conditions. Afternoon temperatures 102 to 105 expected. Major Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * WHERE...In Arizona, Gila River Valley and Parker Valley. In California, Chuckwalla Valley and Palo Verde Valley. * WHEN...From 10 AM MST /10 AM PDT/ to 8 PM MST /8 PM PDT/ Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. An Extreme Heat Warning means that a period of very hot temperatures,

* WHAT...Dangerously hot conditions. Afternoon temperatures 104 to 110 expected. Major Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * WHERE...Imperial County West and Imperial Valley. * WHEN...From 10 AM this morning to 8 PM PDT Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. An Extreme Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to

* WHAT...Sub-freezing temperatures of 26 to 32 degrees expected. * WHERE...Franklin County, and Hampshire County. * WHEN...Until 9 AM EDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Take steps now to protect tender plants from the cold.

* WHAT...Temperatures at or below 32 degrees expected. * WHERE...Northern Saratoga, Southeast Warren, and Washington Counties. * WHEN...Until 8 AM EDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Take steps now to protect tender plants from the cold.

* WHAT...Southeast winds 25 to 35 mph with gusts up to 70 mph possible. * WHERE...St Lawrence Island. * WHEN...From late Wednesday night through late Thursday night. * IMPACTS...High winds may damage property and cause power outages. Travel could be difficult, especially for high profile vehicles. Monitor the latest forecasts and warnings for updates.

* WHAT...Southeast winds 25 to 35 mph with gusts up to 60 mph possible. * WHERE...Bering Strait Coast, Interior Seward Peninsula, Shishmaref, and Southern Seward Peninsula Coast. * WHEN...From Thursday morning through late Thursday night. * IMPACTS...High winds may move loose debris, damage property and cause power outages. Travel could be difficult, especially for high profile vehicles. Monitor the latest forecasts and warnings for updates.

...The Flood Warning continues for the following rivers in Florida... St Johns River Near Astor affecting Volusia and Lake Counties. .The St Johns River at Astor is forecast to continue a steady rise through this week due to northerly winds and repeated rounds of heavy rainfall across the basin. For the St. Johns River...including Astor...Minor flooding is forecast.* WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...St Johns River near Astor. * WHEN...Until further notice.

...The Flood Warning continues for the following rivers in Iowa... Cedar River near Conesville affecting Muscatine and Louisa Counties. Iowa River at Oakville affecting Louisa County. Iowa River at Wapello affecting Louisa County. Iowa River at Marengo affecting Iowa and Benton Counties.* WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Iowa River at Oakville. * WHEN...Until Thursday evening. * IMPACTS...At 11.0 feet, Flood waters begin to impact agricultural land. * ADDITIONAL DETAILS... - At 8:00 PM CDT Tuesday the stage was 11.1 feet.

...The Flood Warning continues for the following rivers in Iowa... Cedar River near Conesville affecting Muscatine and Louisa Counties. Iowa River at Oakville affecting Louisa County. Iowa River at Wapello affecting Louisa County. Iowa River at Marengo affecting Iowa and Benton Counties.* WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Cedar River near Conesville. * WHEN...Until late Thursday night. * IMPACTS...At 14.0 feet, Water affects residences along County Road F70. * ADDITIONAL DETAILS... - At 8:00 PM CDT Tuesday the stage was 13.9 feet.

...The Flood Warning continues for the following rivers in Iowa... Cedar River near Conesville affecting Muscatine and Louisa Counties. Iowa River at Oakville affecting Louisa County. Iowa River at Wapello affecting Louisa County. Iowa River at Marengo affecting Iowa and Benton Counties.* WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Iowa River at Wapello. * WHEN...Until Friday morning. * IMPACTS...At 21.0 feet, Agricultural land near the river is flooded and water covers most islands. Water starts rising onto secondary roads in Wapello Bottoms.