* WHAT...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration.
* WHERE...Puerto Rico and U.S. Virgin Islands.
* WHEN...From 10 AM this morning to 4 PM AST this afternoon.
* IMPACTS...High temperatures or elevated heat indices can worsen symptoms in people with chronic conditions. They can also increase the risk of heat-related illness among individuals sensitive to heat with inadequate cooling or hydration. These risks are highest across coastal areas, lowlands, interior valleys, and urban zones.