Is it hot enough for you? It very well will be in the Northeast, as a heat wave sweeps into the region. The National Weather Service has issued an excessive-heat advisory for various Northeastern cities, citing triple-digit temperatures that could pose "a dangerous situation." An advisory has been issued for Philadelphia until Wednesday evening, and sweltering temps in New York City may not break until after 6 p.m. Tuesday. Additional advisories may be issued for New Jersey, northeastern Maryland, and central and southern Delaware. Tuesday will see the most scorching temps, with highs between 100 to 102 degrees and heat index values up to 106.