Tonight I noticed brilliant red skies at sunset here in Los Angeles from the coast inland toward the East.

No, it was not an aurora display.  (I wish).

However, there is something irritating our lungs, our eyes, and our throats.

And it does not smell like a forest fire.

I saw that too. The sky seemed especially large looking north from the 14 freeway just after sunset.
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Yesterday I heard several people complaining about headaches and for a few hours in the early afternoon I noticed distinct contrails all across the sky which is kind of unusual for this area from what I've seen.
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I have not felt any irritation (lungs, eyes, throats) myself, but others I have spoken to have complained.
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Ah, those fast disappearing geo-engineering trails across the sky.

Yes, my husband and I have noticed them for the past three days.

What could they be spraying that would cause these flu-like symptoms?

At first glance, these red skies reminded me of the Mexican volcano that had erupted several years ago.
It also brought with it headaches and throat irritation due to the volcanic plume in the air.

My friends in Arizona are all sick with flu-like symptoms.

Everyone I know in Los Angeles feels like they are being poisoned. They have coughs, sore throats, abdominal discomfort with alternate chills and sweating. It does not seem to be the flu, but more consistent with toxic overload (poisoning).

Yes, Los Angeles skies are red from sunset to sunset, day after day. Forecasts of rain are suddenly changed to a cloudy forecast without rain, and we have more predictions of drought even though heavy rains are occurring in the Northwestern areas. Yes, even the government admits that they have control of the weather. I have heard these boasts from meterologists on radio stations such as KFI.