Acton, CA Severe Weather Alertstar_ratehome

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM PDT SATURDAY FOR
AN UNSEASONABLY HOT AND UNSTABLE AIR MASS CAPABLE OF PRODUCING
EXTREME FIRE BEHAVIOR FROM VERTICAL PLUME GROWTH...LOW RELATIVE
HUMIDITY...LOCALLY GUSTY WINDS...ISOLATED DRY LIGHTNING STRIKES,
AND CRITICALLY DRY FUELS FOR PORTIONS OF THE MOUNTAINS AND
FOOTHILLS OF LOS ANGELES AND VENTURA COUNTIES...

* TEMPERATURES...Unseasonably hot high temperatures, generally
95-110 degrees today (cooling a few degrees on Saturday),
producing unstable conditions, with deep mixing heights of
12,000 to 18,000 feet.

* RELATIVE HUMIDITY...Minimum relative humidity 8-20 percent,
except 20-40 percent across higher mountains.

* THUNDERSTORMS...Isolated thunderstorms will be possible through
the weekend, and any accompanying lightning strikes will be
capable of starting new fires on the peripheries of rain cores.
In addition, the environment will be favorable for strong
downburst/outflow winds gusting 40 to 50 mph, capable of causing
rapid fire spread. In addition, distant thunderstorms will be
capable of bringing sudden wind shifts and increased fire-spread
rates.

* WINDS...Outside of thunderstorms, southwest at 10-20 mph gusting
to 20-25 mph over the western Antelope Valley Foothills and
vicinity and in other wind- favored areas such as through passes
and canyons. Lighter winds elsewhere.

* IMPACTS...If fire ignition occurs, conditions are favorable
for extreme fire behavior and rapid fire growth, which could
threaten life and property. Be aware of sudden re-direction of
fires in response to passing outflow boundaries.

* ADDITIONAL DETAILS...Red Flag Warning headlines may eventually
need to be extended into Sunday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that fire-weather conditions are
expected to be favorable for the development of extreme fire
behavior. Use extreme caution with anything that can spark a
wildfire. Residents near wildland interfaces should be prepared
to evacuate if a wildfire breaks out. See readyforwildfire.org
and wildfirerisk.org for information.

&&

...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT SUNDAY...

* WHAT...Dangerously hot daytime conditions with high temperatures
of 95 to 110 degrees expected, and warm overnight conditions.

* WHERE...For many valleys and interior mountains of southwest
California.

* WHEN...Until 9 PM PDT Sunday.

* IMPACTS...There is a high risk for dangerous heat illness for
anyone, especially for the very young, the very old, those without
air conditioning, and those active outdoors.

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.

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.

To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.

Stay cool, stay hydrated, stay informed.

Monitor the latest forecasts and warnings for updates.

&&