014
WWUS74 KBRO 181531
NPWBRO
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1031 AM CDT THU JUN 18 2026
TXZ248>255-351-353>355-190130-
/O.NEW.KBRO.XH.A.0002.260619T1600Z-260620T0100Z/
/O.CON.KBRO.XH.W.0001.260618T1600Z-260619T0100Z/
ZAPATA-JIM HOGG-BROOKS-INLAND KENEDY-STARR-SOUTHERN HIDALGO-
INLAND WILLACY-INLAND CAMERON-COASTAL KENEDY-NORTHERN HIDALGO-
COASTAL WILLACY-COASTAL CAMERON-
INCLUDING THE CITIES OF HEBBRONVILLE, ROMA, PHARR, EDINBURG, MCALLEN,
RAYMONDVILLE, WESLACO, LAGUNA VISTA, SAN MANUEL, BROWNSVILLE,
FALFURRIAS, HARLINGEN, MISSION, PORT MANSFIELD, ZAPATA, RIO GRANDE
CITY, SARITA, AND PORT ISABEL
1031 AM CDT THU JUN 18 2026
...EXTREME HEAT WATCH IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY
EVENING...
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS
EVENING...
* WHAT...FOR THE EXTREME HEAT WARNING, DANGEROUSLY HOT CONDITIONS
WITH HEAT INDEX VALUES UP TO 124 EXPECTED. FOR THE EXTREME HEAT
WATCH, DANGEROUSLY HOT CONDITIONS WITH HEAT INDEX VALUES UP TO 120
POSSIBLE.
* WHERE...ALL OF DEEP SOUTH TEXAS, EXCEPTING THE BARRIER ISLANDS
* WHEN...FOR THE EXTREME HEAT WARNING, UNTIL 8 PM CDT THIS EVENING.
FOR THE EXTREME HEAT WATCH, FROM FRIDAY MORNING THROUGH FRIDAY
EVENING.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT AND HIGH HUMIDITY EVENTS.
* ADDITIONAL DETAILS...WHILE OVERNIGHT HEAT INDICES WILL NOT MEET
EXTREME HEAT WARNING OR HEAT ADVISORY CRITERIA, THERE WILL BE
LITTLE RELIEF FROM THE HEAT. HEAT INDICES ARE EXPECTED TO REMAIN
ABOVE 90 DEGREES TONIGHT. CONTINUE TO STAY HYDRATED, USE AIR
CONDITIONING WHEN POSSIBLE (OR STAY WITH A FRIEND OR FAMILY MEMBER
WHO HAS AIR CONDITIONING), AND CHECK ON THOSE WHO MAY BE MORE
VULNERABLE TO THE HEAT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DRINK PLENTY OF FLUIDS, STAY IN AN AIR-CONDITIONED ROOM, STAY OUT OF
THE SUN, AND CHECK UP ON RELATIVES AND NEIGHBORS.
DO NOT LEAVE YOUNG CHILDREN AND PETS IN UNATTENDED VEHICLES. CAR
INTERIORS WILL REACH LETHAL TEMPERATURES IN A MATTER OF MINUTES.
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.
STAY COOL, STAY HYDRATED, STAY INFORMED.
IF YOU DO NOT HAVE AIR CONDITIONING IN YOUR HOME OR LACK SHELTER, YOU
CAN CALL 211 OR VISIT HTTP://WWW.211TEXAS.ORG FOR ASSISTANCE LOCATING
APPROPRIATE SHELTER FROM THE HEAT.
MM
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