Three separate downpours across three states from July 25th to August 1st destroyed homes and businesses, killed crops and left at least 39 people dead. Each of these downpours was a one-in-a-thousand historic rainfall event, prompting climate experts to warn that the frequency and intensity of these storms are increasing.

According to the Centers for Disease Control and Prevention (CDC), about 19.2 million American adults over the age of 18 were diagnosed with hay fever, also known as allergic rhinitis, in the last 12 months. Hay fever can cause cold-like symptoms like congestion, sneezing, runny nose, itchy eyes and sinus pressure.