Based on the search results, here are the allergies that are high today in Austin:

• Mold: According to the Austin Allergy Report, mold is high today.
• Ragweed: The Allergy Forecast by The Weather Channel shows that ragweed pollen is moderate today.
• Fall Elm: The Allergy Count by KVUE shows that fall elm is low today.
• Tree: The Austin Tree Pollen Allergen Forecast by AccuWeather does not show any tree pollen today.

It is important to note that allergen levels can vary depending on the time of year and other factors, so it is recommended to check the allergy reports frequently for the most up-to-date information.