Residents in the Southwest should prepare for potential severe thunderstorms and heavy rainfall, which could lead to localized flooding. Meanwhile, the central U.S. will experience a heat wave, with temperatures climbing significantly. In Pennsylvania's Zone PAZ060, the humid conditions and chance of thunderstorms may disrupt outdoor activities, particularly in the afternoon and evening. Gusty winds up to 20 mph could accompany storms, posing a risk to unsecured outdoor items.