Severe

* WHAT...Dangerously hot conditions possible. Afternoon temperatures 104 to 108. Major Heat Risk. * WHERE...Yuma area. * WHEN...From Wednesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. An Extreme Heat Watch means that a period of very hot temperatures,

* WHAT...Dangerously hot conditions possible. Afternoon temperatures 103 to 106. Major Heat Risk. * WHERE...In Arizona, Gila River Valley and Parker Valley. In California, Chuckwalla Valley and Palo Verde Valley. * WHEN...From Thursday morning through Thursday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke.

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Gadsden County in Big Bend Florida... * WHEN...Until 500 AM EDT. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. * ADDITIONAL DETAILS... - At 151 AM EDT, Doppler radar indicated light rain remaining across the area. Flooding is already occurring in the warned area. Between 7 and 11 inches of rain have fallen. - Additional rainfall amounts of 0.5 to 1 inch are possible in the

* WHAT...Temperatures at or below 32 degrees expected. * WHERE...Northern Saratoga, Northern Washington, Southeast Warren, and Southern Washington Counties. * WHEN...From midnight tonight to 8 AM EDT Wednesday. * 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...Flooding caused by excessive rainfall is possible. * WHERE...Portions of northeast Florida, including the following areas, Coastal Duval, Coastal Flagler, Coastal Nassau, Eastern Clay, Eastern Putnam, Inland Flagler, Inland Nassau, Northeast Coastal St. Johns, Northern Inland St. Johns, South Central Duval, Southeast Coastal St. Johns, Southern Inland St. Johns, Trout River, Western Duval and Western St. Johns and southeast Georgia, including the following areas, Coastal Camden and Inland Camden.

* WHAT...Southwest winds 50 to 70 mph with gusts up to 90 mph possible. * WHERE...Shemya and Attu Islands. * WHEN...From Wednesday morning through Thursday morning. * IMPACTS...High winds could move loose debris, damage property, and cause power outages. Travel could be difficult. * ADDITIONAL DETAILS...Ex-Typhoon Choi-Wan moves into the Bering, bringing strong gusty southwest winds to the Shemya region from Wednesday morning to Thursday morning. The strongest wind gusts of

* WHAT...South winds 40 to 50 mph with gusts up to 75 mph possible. * WHERE...Pribilof Islands. * WHEN...From late Wednesday night through Thursday morning. * IMPACTS...High winds could move loose debris, damage property, and cause power outages. Travel could be difficult. * ADDITIONAL DETAILS...Ex-Typhoon Choi-Wan moves into the Bering, bringing strong gusty south-southeast winds to the Pribilof Islands from late Wednesday night morning to late Thursday morning. The strongest wind gusts of up to 75 mph are expected between 4 AM to 8

* WHAT...South winds 40 to 60 mph with gusts up to 80 mph possible. * WHERE...Atka and Adak. * WHEN...From Wednesday afternoon through late Wednesday night. * IMPACTS...High winds could move loose debris, damage property, and cause power outages. Travel could be difficult. * ADDITIONAL DETAILS...Ex-Typhoon Choi-Wan moves into the Bering, bringing strong gusty southerly winds to the Adak and Atka region from Wednesday afternoon to early Thursday morning. The strongest wind gusts of up to 80 mph are expected late Wednesday evening with

...The Flood Warning is extended for the following rivers in Illinois...Missouri... Mississippi River at Louisiana. ...The Flood Warning is cancelled for the following rivers in Illinois...Missouri... Mississippi River at Clarksville. River forecasts are based on observed precipitation and forecast precipitation for the next 48 hours. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Mississippi River at Louisiana. * WHEN...Until Wednesday afternoon. * ADDITIONAL DETAILS...

* WHAT...Dangerously hot conditions with high temperatures ranging from the mid 80s to lower 90s at the beaches to the mid to upper 90s near higher coastal terrain. Nights will be very warm with low temperatures in the lower to mid 70s. * WHERE...Orange County Coastal Areas. * WHEN...Until 8 PM PDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.