Weather

It will be so hot in Miami that forecasters just issued a warning

A worker on the expansion of Flagler Street and 12th Avenue covers himself from the heat on Thursday, August 3, 2017. The National Weather Service issued a heat advisory for wide swaths of South Florida through 7 p.m. Thursday.
A worker on the expansion of Flagler Street and 12th Avenue covers himself from the heat on Thursday, August 3, 2017. The National Weather Service issued a heat advisory for wide swaths of South Florida through 7 p.m. Thursday. rkoltun@miamiherald.com

Emily’s deluge might have cooled down the heat, but that didn’t last long.

Just days after the tropical storm broke Miami’s second-longest streak of consecutive 90-plus degree days, the National Weather Service issued a heat advisory for wide swaths of South Florida through 7 p.m. Thursday. The heat index, which factors in the humidity with the measured temperature to estimate how hot it feels, may exceed 110 degrees in some areas, the agency said.

The advisory initially extended from the Gulf Coast through most of inland Broward and Miami-Dade, but the agency expanded it to virtually all of South Florida, including Hendry County, metro Broward and metro Palm Beach, by early afternoon.

The heat may be accompanied by isolated thunderstorms that last into the evening and frequent lightning may be a threat, forecasters say.

July was the hottest month for Miami on record since the National Weather Service began tracking the temperature in 1895. The average temperature for the month was around 85.7 degrees, beating June 2010’s 85.5 degree average.

August’s early heat is likely to persist into the weekend. The weather agency said the heat index might exceed 105 degrees in parts of South Florida both Friday and Saturday, and said the scattered thunderstorms are also expected to continue.

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