Expected

* WHAT...Dangerously hot conditions with high temperatures in the mid 90s to 105 expected. * WHERE...San Diego County Mountains. * WHEN...Until 8 PM PDT Sunday. * 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 temperatures of 100 to 112 expected. * WHERE...Apple and Lucerne Valleys. * WHEN...Until 8 PM PDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Temperatures will range from 102 to 108 for Lucerne Valley westward, and 108 to 112 near Johnson Valley. 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 several days of Major to Extreme heat risk. * WHERE...Indian Wells Valley, Mojave Desert, and Mojave Desert Slopes. * WHEN...Until 11 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Dangerously hot conditions with high temperatures up to 112. Overnight lows will range from 75-82 degrees. Drink plenty of fluids, stay in an air-conditioned room, stay out of

* WHAT...Dangerously hot conditions with heat index values up to 110 expected, and overnight low temperatures in the 80s. * WHERE...Arches/Grand Flat and Canyonlands/Natural Bridges. * WHEN...From noon Saturday to 9 PM MDT Monday. * 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...Flooding caused by excessive rainfall is expected. * WHERE...Northwestern Day County in northeastern South Dakota... * WHEN...Until 1000 AM CDT Friday. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. It will take several hours for all the water from these storms to work through local drainage systems in urban areas. * ADDITIONAL DETAILS... - At 953 PM CDT, emergency management reported heavy rain in the

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...East Central Lyman County in central South Dakota... * WHEN...Until 1000 AM CDT Friday. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. * ADDITIONAL DETAILS... - At 958 PM CDT, Doppler radar indicated heavy rain due to thunderstorms. Flooding is ongoing or expected to begin shortly in the warned area. Between 3 and 4 inches of rain have fallen.

* WHAT...Dangerously hot conditions with heat index values up to 111 expected. * WHERE...In Arkansas, Southern Crawford, Central and Southern Franklin, and North and Central Sebastian Counties. In Oklahoma, Central and Southern Sequoyah and Northern Le Flore Counties. * WHEN...From noon to 9 PM CDT Friday. * 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

* WHAT...Dangerously hot conditions with heat index values up to 111 expected. * WHERE...Muskogee, Mayes, Okmulgee, Rogers, Tulsa, Wagoner, Haskell, McIntosh, and Pittsburg Counties. * WHEN...From noon to 9 PM CDT Friday. * 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. To reduce risk during outdoor work, the Occupational Safety and

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Central Potter County in north central South Dakota... * WHEN...Until 245 AM CDT. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. * ADDITIONAL DETAILS... - At 848 PM CDT, Doppler radar indicated heavy rain due to thunderstorms. Flooding is ongoing or expected to begin shortly in the warned area. Between 2 and 3 inches of rain have fallen.

* WHAT...For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 111. For the Heat Advisory, heat index values up to 110 expected. * WHERE...Atoka, Bryan, and Coal Counties. * WHEN...For the Extreme Heat Warning, until 9 PM CDT this evening. For the Heat Advisory, from noon to 9 PM CDT Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.