Multiple states are under extreme heat warnings, advisories or watches on July 23, according to the National Weather Service.

The National Weather Service has warned of "searing heat and oppressive humidity that occurs during the 'dog days of summer'.

Exceedingly dangerous conditions could result in multidirectional fire spread and spotting up to a mile,” said a warning from the Siskiyou County sheriff.

Extreme heat is impacting states across the country. See maps of high temperature forecasts and heat index levels.

The National Weather Service sent out millions of extreme heat warnings, heat watches and heat advisory alerts early Monday ...

The heat dome won't dissipate soon. Dangerous heat is expected across parts of the Central and Southeast. through July, the ...

The National Weather Service urged people to avoid travel if a flash flood warning was in place for their area.

Life-threatening conditions were expected in some areas, with people told to stay out of the water until conditions improve.

A heat dome​ is trapping over 90 million Americans in extreme temperatures this week with the National Weather Service​ issuing heat alerts from Nebraska to Florida.

A map from the National Weather Service (NWS) published on Tuesday shows dozens of states with a slight or marginal risk of excessive rainfall following a devastating period of flash flooding in Texas ...

At 1:18 p.m. on July 3, the NWS flood watch warned of "isolated amounts of 5 to 8 inches" of rain, saying "creeks and streams may rise out of their banks." It warned people in flood-prone areas to ...