* WHAT. Heat index values up to 102 expected. * WHERE. Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN. From 10 AM to 10 PM EDT Tuesday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS. This is the start of a prolonged period of excessive heat with high temperatures in the mid to upper 90s through the week. The early season heat combined with the prolonged nature of the heat may cause heat related impacts that exceed anticipate heat illnesses or on heat sensitive infrastructure normally associated with a Heat Advisory.

* WHAT. Heat index values up to 103 expected. * WHERE. Portions of northern and northwest New Jersey and east central, northeast, and southeast Pennsylvania. * WHEN. From 10 AM to 10 PM EDT Tuesday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS. This is the start of a prolonged period of excessive heat with high temperatures in the mid to upper 90s through the week. The early season heat combined with the prolonged nature of the heat may cause heat related impacts that exceed anticipate heat illnesses or on heat sensitive infrastructure normally associated with a Heat Advisory.

* WHAT. Heat index values up to 100 expected. * WHERE. Western Monmouth, Ocean, and Southeastern Burlington Counties. * WHEN. From 10 AM to 10 PM EDT Tuesday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS. The highest heat values will be displaced to the western locations of each county. Along the shore, temperatures will be lower due to the sea breeze from the Atlantic Ocean. This is the start of a prolonged period of excessive heat with high temperatures in the mid to upper 90s through the week. The early season heat combined with the prolonged nature of the heat may cause heat related impacts that exceed anticipate heat illnesses or on heat sensitive infrastructure normally associated with a Heat Advisory.