Residents of central Pennsylvania should prepare for hazy skies and reduced air quality today as wildfire smoke from Canada persists across the region. An air quality alert remains in effect until midnight, with visibility potentially limited and particulate matter levels elevated.

An air quality alert was issued by the National Weather Service in Mount Holly at 3:47 a.m. on Tuesday, Aug. 5. This warning applies to Delaware, Philadelphia, Western Chester, Eastern Chester, Western Montgomery, Eastern Montgomery, Upper Bucks and Lower Bucks counties.

Extreme heat warnings are remaining in place for parts of southeast California, southern Nevada and much of Arizona where high temperatures between 108 and 118 degrees are possible through Friday. Record high temperatures are also possible for cities like Phoenix and Tucson through Thursday, including Albuquerque through Friday.