Severe

* WHAT...Dangerously hot conditions with high temperatures ranging from the mid 80s to mid 90s. Nights will be very warm with low temperatures in the upper 60s to low 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. Do not leave young children and pets in unattended vehicles. Car

* WHAT...Dangerously hot conditions with high temperatures in the 90s. Nights will be very warm with low temperatures in the upper 60s to mid 70s. * WHERE...Santa Ana Mountains and Foothills. * 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. Do not leave young children and pets in unattended vehicles. Car

...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH FRIDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF NE AND WY... The National Weather Service in Cheyenne WY has issued a Fire Weather Watch. * AFFECTED AREA...Fire Weather Zones 417 through 422, 425, 427, 432, and 434. * TIMING...From Friday afternoon through Friday evening. * WINDS...Southwest winds 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...Relative Humidity between 12 to 20 percent.

* WHAT...Dangerously hot conditions possible. Afternoon temperatures 103 to 107. Major Heat Risk. * WHERE...Yuma area. * WHEN...Until 8 PM MST Friday. * 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 Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to

* WHAT...Dangerously hot conditions possible. Afternoon temperatures 104 to 109. Major Heat Risk. * WHERE...Portions of Imperial County, including the Imperial Valley. * WHEN...Until 8 PM PDT Friday. * 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 Warning means that a period of very hot temperatures,

* WHAT...Dangerously hot conditions possible. Afternoon temperatures 102 to 106. Major Heat Risk. * 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. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke.

The National Weather Service in Billings has issued a Fire Weather Watch...which is in effect from Friday afternoon through Friday evening. * IMPACTS: Low humidities, unseasonably warm temperatures, and strong gusty winds will create erratic fire behavior for new or existing fires. * AFFECTED AREA: In South Central MT Fire Zones...123...124. * COUNTIES AFFECTED: In Central MT...Wheatland. In South Central MT...Park...Sweet Grass. In Southwest MT...Gallatin.

...The Flood Warning continues for the following rivers in Florida... Withlacoochee At US 41 Dunnellon affecting Marion, Citrus and Levy Counties. .Elevated water levels continue on the Withlacoochee River at Dunnellon due to excessive hydrilla growth along a 4.5 mile stretch of river between U.S. 41 and Lake Rousseau. The hydrilla has been acting like a dam and holding water back, keeping levels elevated. With heavy rainfall occurring near Dunnellon, the river has continued

The National Weather Service in Great Falls has issued a Fire Weather Watch for hot temperatures, gusty winds, and low relative humidity, which is in effect Friday afternoon. * AFFECTED AREA...Central and Eastern Lewis and Clark National Forest Areas and Helena and Townsend Ranger Districts of the Helena National Forest. * WINDS...Southwest 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 13 percent. * TEMPERATURES...Up to 82 degrees. * IMPACTS... Any fires that develop will spread rapidly.

The National Weather Service in Riverton has issued a Fire Weather Watch, which is in effect from Friday afternoon through Friday evening. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...289. In North Central WY Fire Zone....281. In Southwest WY Fire Zone....279. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Johnson.