Expected

* WHAT...Dangerously hot conditions with heat index values up to 115. * WHERE...Harrison and Shelby Counties. * WHEN...Until 10 PM CDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Dangerously hot conditions expected. Afternoon temperatures in the desert valleys will climb into the 108 to 114 degree range. Temperatures in the Colorado River Valley may exceed 115 degrees. Temperatures in the lower elevations of Death Valley will range from 115 to 120 degrees. Overnight lows generally 80 to 95 degrees. * WHERE...Portions of northwest Arizona, southeast California, and southern Nevada including the Greater Mojave Desert region. * WHEN...Until 8 PM PDT /8 PM MST/ this evening.

* WHAT...Dangerously hot conditions with high temperatures in the mid 100s expected. Low temperatures around 80 degrees will provide little relief from the heat. HeatRisk will be in the orange (moderate) to red (major) range today. * WHERE...Glen Canyon Recreation Area/Lake Powell. * WHEN...Until midnight MDT tonight. * 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.

* WHAT...Dangerously hot conditions with high temperatures up to 108. * WHERE...Indian Wells Valley and Mojave Desert. * WHEN...Until 9 PM PDT this evening. * 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 interiors will reach lethal temperatures in a matter of minutes.

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Eastern Effingham County. * WHEN...Until 930 AM CDT. * IMPACTS...Expect many areas of slow moving or standing water. * ADDITIONAL DETAILS... - At 625 AM CDT, Doppler radar showed that storms had finally moved east of the area, but reports indicate a number of areas still seeing standing water from the earlier rain, especially near Effingham and Teutopolis. Between 4 and 6 inches of rain have fallen.

* WHAT...For the Extreme Heat Warning, dangerously hot conditions with peak heat index values 110 to locally over 115 degrees expected. For the Dense Fog Advisory, visibility less than one quarter mile in dense fog. * WHERE...Livingston, De Kalb, La Salle, Lee, Ogle, Winnebago, and Grundy Counties. * WHEN...For the Extreme Heat Warning, until 9 PM CDT this evening. For the Dense Fog Advisory, until 8 AM CDT this morning. * IMPACTS...Heat related illnesses increase significantly during

* WHAT...Dangerously hot conditions with peak heat index values 110 to locally over 115 degrees expected. * WHERE...Ford County. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Hot daytime conditions with high temperatures between 100 and 108 common. Warm overnight conditions will bring less relief than usual. * WHERE...Antelope Valley. * WHEN...Until 8 PM PDT this evening. * IMPACTS...There is a high risk for dangerous heat illness, especially for sensitive groups like the very young, the very old, those without air conditioning, and those active outdoors. Drink plenty of fluids, stay in an air-conditioned room, stay out of

* WHAT...For the Heat Advisory, heat index values up to 109. For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 111 expected. * WHERE...Portions of central, north central, northwest, southwest, and west central Mississippi. * WHEN...For the Heat Advisory, until 9 PM CDT this evening. For the Extreme Heat Warning, from 10 AM to 9 PM CDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high

* WHAT...Dangerously hot conditions with heat index values in excess of 110 degrees. * WHERE...Portions of north central and northwest Mississippi. * WHEN...For the first Extreme Heat Warning, until 9 PM CDT this evening. For the second Extreme Heat Warning, from 10 AM to 9 PM CDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.