State officials say the toxin reading is the highest ever recorded in Nevada, more than 3,100 times the EPA's health threshold.

Sacramento will hit about 100 degrees Thursday under a Heat Advisory before temperatures plunge into the 80s this weekend.

Wednesday brings clear skies and an 89-degree high to Washington before a 50% chance of showers and thunderstorms develops after 2 p.m. Thursday. A quieter weekend follows.

Officials want lights dimmed for three nights as migrants stream over a city ranked the nation's deadliest for birds.

Philadelphia climbs to 88 degrees Wednesday before storms arrive Thursday night and a cooler Friday follows.

Minneapolis gets a sunny, warm Thursday before gusty winds and thunderstorms arrive Friday evening. Cooler, wetter weather follows Sunday and Monday.

Nashville could hit 95 degrees Thursday, with a heat index near 102 before afternoon storms roll in. A wetter weekend is ahead.

Denver gets a sunny 83-degree Wednesday before temperatures climb into the 90s Thursday and Friday.

San Diego faces another hot Thursday with a high in the 80s at the beaches and an Extreme Heat Warning through 8 p.m. Cooler, foggier weather arrives Friday and expands through the weekend.

Miami could see morning showers and thunderstorms Thursday, with heat indexes reaching 106. A wetter pattern takes hold through the weekend.

San Francisco’s hot stretch peaks Thursday before a cooler, windier pattern takes over. Coastal fog may return as temperatures drop through next week.

Fog and humidity start Thursday in New York City before sunshine pushes temperatures to 85 degrees. Beachgoers face dangerous rip currents, and a stormier weekend is ahead.

LSU entomologist Aaron Ashbrook says love bugs aren't even true bugs — they're flies with two generations a year.