Describe the issue: When creating a NumPy array from a list of lists with dtype=object, NumPy implicitly promotes inner lists to ndarray if their lengths are uniform, but keeps them as list if not.

Heat dome continues to raise temps across South and Midwest, will begin to move into Northeast ‘Corn sweat’ has increased temperatures throughout the Plains and Midwest this week.

Meteorologist Cassie Campbell says heat index values will reach the triple digits. Most of the Heartland will stay dry over the weekend, but isolated storm could lead to brief cool-downs.

Inflation rose by three-tenths of a percentage point to 2.7% for the year ending in June, the Bureau of Labor Statistics reported Tuesday in an update to the consumer price index.

The UV index, a scale from 0-11+, indicates the strength of the sun's ultraviolet radiation and the risk of sunburn. Sunburns can occur even on cloudy days and can cause long-term skin damage.

João Pedro is the latest Chelsea signing aimed at bolstering their attack, and here are the shirt numbers he could wear at Stamford Bridge.

The UV index numbers change as the day progresses, based on the sun's position, and are calculated using forecast ozone levels, cloudiness and elevation, according to the NWS.

To get through the hottest days of summer, here's how to read the UV index so you know when the sun is most dangerous.