The oppressive heat gripping Westchester Wednesday has emergency rooms on standby for heat-related illnesses.

With the heat index in the triple digits, health experts say everyone is at risk. Emergency room doctors say they have seen an increase in heat-related cases with the increase in the temperatures. Health experts say both children and seniors are especially at risk. It is recommended to drink more water than usual in the extreme heat.

Doctors say the longer the extreme heat continues, the more chance that people will suffer from heat exhaustion. They say to check for signs of heat exhaustion, which include listlessness and nausea.