* WHAT...Temperatures of 95 to 100 through Sunday afternoon.

* WHERE...Eastern Magic Valley, Shoshone/Lava Beds, Arco/Mud Lake Desert, Franklin/Eastern Oneida Region, Lower Snake River Plain, Marsh and Arbon Highlands, Raft River Region, Southern Hills/Albion Mountains, and Upper Snake River Plain.

* WHEN...Until 9 PM MDT Sunday.

* IMPACTS...Hot temperatures may cause heat illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

...RED FLAG WARNING IN EFFECT FROM 1 PM TO 9 PM MDT TODAY FOR SCATTERED THUNDERSTORMS FOR IDAHO FIRE WEATHER ZONES 410, 413, AND 427...

* AFFECTED AREA...Fire Weather Zone 410 Upper Snake River Valley/Idaho Falls BLM, Fire Weather Zone 413 Caribou Range/Caribou NF and Fire Weather Zone 427 Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River.

* IMPACTS...Scattered thunderstorms can produce frequent lightning that may in turn produce wildfire starts in receptive fuels.

* THUNDERSTORMS...A mix of wet and dry storms.

* OUTFLOW WINDS...Gusts over 35 mph with peak gusts nearing 45- 55 mph.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho:

- Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain.

- Thunderstorm coverage of 25 percent, without specific rainfall criteria.

- Other high impact events deemed critical by the National Weather Service and area fire management agencies. close