Warm temperatures are causing birch buds to burst, sending large amounts of pollen in the air. In Chuathbaluk, there was so much pollen, it was visible as a tornado.

Seeing pollen in rainwater is unusual.

After a cold winter and spring, high temperatures around the Interior prompted birch tree buds to burst, sending record-setting levels of pollen into the air.

Unusually high levels of seasonal pollen create a visible sheen on water.