The heavy spraying in the sky is classic today.
Look for yourself.
When these lines are first laid out they are thin but in 5 minutes they expand exponentially up to several miles across.

45K ft high or more.
ITs too early for allergies but I hear many allergy complaints of eye and sinus irritation lately.

Right now there are about 15 soild airplane spray trails.
Look for the planes that have a normal vapor trail that dissipates after a short time.
The trails that grow bigger - are not vapor trails.

It still surprises me that people don;t see this a a daily basis as I do.