Causes. Although doctors don't know what causes ITP, they know that it happens when your immune system -- your body's defense against disease -- doesn't work right. Your antibodies, which are supposed to attack infections, instead mistakenly destroy your blood platelets.
Although not as strong as the Asian monsoon, the cycle is typical of monsoon seasons worldwide. The monsoon season begins on June 15 and ends on September 30, but the storms peak between mid-July and mid-August. On average, about half of Arizona receives about half of its annual rainfall during the monsoon. However, rainfall can vary tremendously between distances of just a few miles.
Arizona and New Mexico receive up to half of their annual rainfall during the summer monsoon (Figure 1). The monsoon season suppresses much of the hot summer temperatures, replenishes water resources, and nourishes the vegetation. The monsoon arrives with much flash and fanfare, with its trademark thunderstorms and flooded streets in southwestern cities.