BANGOR, Maine (WABI) - Thursday’s oppressive heat and humidity marked the worst of the current stretch, but Friday will bring one more dangerous day before relief arrives. A FIRST ALERT remains in effect for Friday for both inland and coastal communities. Temperatures will climb to the upper 80s and mid-90s, with coastal areas experiencing the hottest conditions of the entire heat wave. Heat index values will range from the mid-90s to the lower 100s, prompting Heat Advisories across the region.