Record heat in Plains, Southeast to bring low triple-digit high temperatures

Record-breaking heat is gripping parts of the continental U.S. 

High temperatures will range from the 90s to the low 100s from the lower and central Plains and across the Southeast. 

A number of daytime record high temperatures will be broken on Tuesday and Wednesday. 

Meanwhile, Hurricane Fiona has strengthened to a major Category 3 storm. 

NOAA DEPLOYS NEW HURRICANE TECHNOLOGY TO IMPROVE FORECASTING

While now north of Puerto Rico and moving over the Bahamas, the storm is still pulling moisture behind it, and rounds of rain can be expected for Puerto Rico until Wednesday morning. 

Flood advisories will remain in place for the U.S. territory until Tuesday evening. 

HURRICANE FIONA UPGRADED TO CATEGORY 3 AS IT HEADS FOR TURKS AND CAICOS ISLANDS

Fiona’s storm track will turn to the northeast on Tuesday and move toward Bermuda. 

The storm will stay far off the U.S. coast, but choppy seas and rip currents will be seen up and down East Coast beaches.