* WHAT...High temperatures of 95 to 100 are expected. Low
temperatures will be mainly in the mid to upper 50s.

* WHERE...Lake County and eastern Klamath County, South Central
Siskiyou County, North Central and Southeast Siskiyou County,
Northeast Siskiyou and Northwest Modoc Counties, Modoc County, and
Klamath Basin. This includes Klamath Falls, Lakeview, Mount
Shasta, and Alturas.

* WHEN...Until 8 PM PDT Tuesday.

* IMPACTS...An increased chance of heat related illness for those
without access to cooling facilities.

* ADDITIONAL DETAILS...Hot temperatures are likely to continue into
mid-week. Warm overnight temperatures will limit relief from hot
daytime temperatures.

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.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

* WHAT...High temperatures of 98-106 degrees expected in lower
elevations Sunday and Monday with overnight low temperatures in
the mid 60s to lower 70s, resulting in widespread Major HeatRisk.
Tuesday may not be quite as hot, but some valley sites could still
see highs near or above 100 degrees.

* WHERE...In California, Surprise Valley California. In Nevada,
Northern Washoe County, Western Nevada Basin and Range including
Pyramid Lake, Greater Reno-Carson City-Minden Area, and Mineral
and Southern Lyon Counties.

* WHEN...Until 11 AM PDT Wednesday.

* IMPACTS...Heat related illnesses increase significantly during
heat events, particularly for those working or participating in
outdoor activities.

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.