An Excessive Heat Warning is something I've never even heard of, but it appies right ow and is in effect for all of Western New Your through Monday night at 10 pm with the most extreme heat being felt between 12 noon and 8pm today and tonorrow, according to The Weather Channel.

What is an "Excessive Heat Warning"? (According to The Weather Channel)

Until 10:00pm EDT, Mon Jul 2

Action Recommended: Execute a pre-planned activity identified in the instructions

Issued by: Buffalo - NY, US, National Weather Service,

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM EDT MONDAY... ...HEAT ADVISORY HAS EXPIRED... * LOCATIONS...NIAGARA, ORLEANS, GENESEE, MONROE, WAYNE, NORTHERN CAYUGA, OSWEGO, LIVINGSTON, AND ONTARIO COUNTIES. * TIMING...THROUGH LATE MONDAY EVENING. THE HIGHEST HEAT INDEX VALUES WILL BE FROM AROUND NOON TO 8 PM EACH DAY. * HEAT INDEX VALUES...AS HIGH AS 104 TO 107. * IMPACTS...CONSECUTIVE DAYS OF DANGEROUS HEAT AND HUMIDITY WILL BRING AN INCREASED RISK FOR HEAT RELATED ILLNESS. THE ELDERLY, VERY YOUNG, PREGNANT, AND THOSE WITH HEART AND RESPIRATORY CONDITIONS THAT DON'T HAVE ACCESS TO AIR CONDITIONING ARE ESPECIALLY AT RISK DURING LONG LASTING HEAT WAVES. PRECAUTIONARY/PREPAREDNESS ACTIONS... AN EXCESSIVE HEAT WARNING MEANS THAT A PROLONGED PERIOD OF DANGEROUSLY HOT TEMPERATURES WILL OCCUR. THE COMBINATION OF HOT TEMPERATURES AND HIGH HUMIDITY WILL COMBINE TO CREATE A DANGEROUS SITUATION IN WHICH HEAT ILLNESSES ARE LIKELY. DRINK PLENTY OF FLUIDS...STAY IN AN AIR-CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK UP ON RELATIVES AND NEIGHBORS. TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE...RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TO REDUCE RISK DURING OUTDOOR WORK...THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY - CALL 9 1 1. YOUNG CHILDREN AND PETS SHOULD NEVER BE LEFT UNATTENDED IN VEHICLES UNDER ANY CIRCUMSTANCES. THIS IS ESPECIALLY TRUE DURING WARM OR HOT WEATHER WHEN CAR INTERIORS CAN REACH LETHAL TEMPERATURES IN A MATTER OF MINUTES.