3:20
Conditions in New York City are not expected to be as intense as they were in June 2023 when smoke from the Canadian wildfires turned skies orange.
![\"PHOTO:](\"http://a.abcnews.com/images/International/fire-main_1784114141467_hpMain_4x3t_384.jpg\")
Hazy skies are expected in New York and air quality will likely become unhealthy.
Smoky conditions could, however, be bad on Thursday from Duluth to Green Bay and Marquette, and through much of northern Michigan.
![\"PHOTO:](\"http://a.abcnews.com/images/US/weather2_1784114225043_hpEmbed_16x9_384.jpg\")
Cleveland, Columbus, Baltimore and Washington, D.C., will likely see heavy smoke on Thursday.
The smoke will be serious for millions and may reach a dangerous level for everyone -- not just those with respiratory issues.
![\"PHOTO:](\"http://a.abcnews.com/images/US/weather5_1784114225049_hpEmbed_16x9_384.jpg\")
Air quality alerts are in place from Minnesota to New York City, including the entire states of Wisconsin and Michigan.
Extreme heat is inundating much of the country. Temperatures along the East Coast from Washington, D.C., to New York City could climb to near 100 degrees on Wednesday.
Heat indices, or what the temperature feels like with humidity, will make it feel like 104 degrees in New York City, 105 in the nation's capital, and up to 107 in Philadelphia.
The hottest day of the Northeast heat spell is likely going to be on Wednesday, with cooler temperatures moving from north to south in the coming days.
Minneapolis remains under an extreme heat warning through Thursday, with the heat index there expected to be near 100.
An extreme heat warning was issued in the Los Angeles area on Wednesday and is expected to stay in effect until Thursday night as Southern California temperatures soared into the high 90s and triple digits.
Los Angeles and Orange counties on Wednesday are expected to see a high of 96 degrees and a low of 69. High temperatures are expected to drop to the low-to-mid 80s by Friday and through the weekend.
California's San Joaquin Valley was also expected to hit the century mark on Wednesday, with temperatures in Fresno expected to climb to 104 and to 105 in Bakersfield.
Meanwhile, flash flooding is expected to continue in Texas Hill Country, where 6- to-16 inches of rain have already fallen this week, prompting numerous water rescues.
The flooding threat in parts of South-Central Texas is at a rare 4 out of 4 level and an additional 6- to-12 inches of rain are expected in the region, specifically in the cities of Loma Alta, Uvalde and San Antonio. Up to 20 inches of rain iis possible in some local areas.
Multiple witnesses spotted a tornado touch down near San Antonio on Wednesday morning. There were no immediate reports of damage.
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